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PyPortall圖像查看器的使用

454398 ? 來源:網(wǎng)絡(luò)整理 ? 作者:網(wǎng)絡(luò)整理 ? 2019-11-28 10:33 ? 次閱讀
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概述

在PyPortal顯示器上關(guān)注Adafruit的最新新功能!

此PyPortal圖像查看器項(xiàng)目使用CircuitPythonESP32 WiFi協(xié)處理器來獲取最新圖像,名稱以及Adafruit的New New最新產(chǎn)品的簡(jiǎn)短URL,因此您將始終了解商店中最新,最酷的商品

零件

AdaBox011-PyPortal

產(chǎn)品ID:4061

借助PyPortal,您可以走到辦公桌外-到達(dá)星星和更遠(yuǎn)的地方!該ADABOX具有易于使用的新型IoT設(shè)備,可讓您自定義和創(chuàng)建。..

缺貨

缺貨

或在下面獲取單獨(dú)的零件:

Adafruit PyPortal-由CircuitPython支持的Internet顯示

產(chǎn)品ID:4116

PyPortal,使用物聯(lián)網(wǎng)設(shè)備,使您可以在幾分鐘之內(nèi)為“物聯(lián)網(wǎng)”創(chuàng)建所有事物。制作自定義觸摸屏界面。..

$ 54.95

進(jìn)貨

添加到購(gòu)物車

Adafruit PyPortal桌面支架外殼套件

產(chǎn)品ID:4146

PyPortal是我們易于使用的IoT設(shè)備,可讓您在數(shù)分鐘內(nèi)為“物聯(lián)網(wǎng)”創(chuàng)建所有東西。創(chuàng)建小口袋。..

$ 9.95

進(jìn)貨

添加到購(gòu)物車

粉紅色和紫色編織USB A到Micro B電纜-2一米長(zhǎng)

產(chǎn)品ID:4148

該電纜具有粉紅色和紫色編織的類似Blinka的圖案,非常時(shí)尚!首先讓我們談一下覆蓋層和包覆成型。我們將這些顏色制成自定義顏色,。..

$ 3.95

入庫(kù)存

添加到購(gòu)物車

安裝CircuitPython

CircuitPython是MicroPython的派生版,旨在簡(jiǎn)化低成本微控制器上的實(shí)驗(yàn)和教學(xué)。它不需要任何前期桌面軟件下載,因此比以往任何時(shí)候都更容易獲得原型。只需復(fù)制并編輯 CIRCUITPY “閃存”驅(qū)動(dòng)器上的文件即可進(jìn)行迭代。

以下說明將向您展示如何安裝CircuitPython。如果您已經(jīng)安裝了CircuitPython,但希望對(duì)其進(jìn)行更新或重新安裝,則同樣的步驟也適用!

設(shè)置CircuitPython快速入門!

請(qǐng)遵循以下快速逐步操作以獲取超快速的Python功能:)

通過CircuitPython.org為該板下載最新版本的CircuitPython

點(diǎn)擊上面的鏈接,為PyPortal下載最新版本的CircuitPython。

下載并將其保存到您的桌面(或方便的任何地方)。

使用已知良好的USB電纜將PyPortal插入計(jì)算機(jī)。

A很多人最終使用僅可充電的USB電纜,這非常令人沮喪!因此,請(qǐng)確保您擁有知道對(duì)數(shù)據(jù)同步有用的USB電纜。

雙擊中間頂部頂部的重置按鈕(洋紅色箭頭)在板上,您將看到NeoPixel RGB LED(綠色箭頭)變?yōu)榫G色。如果它變成紅色,請(qǐng)檢查USB電纜,嘗試使用另一個(gè)USB端口,等等。注意:USB接口旁邊的紅色小LED指示燈將呈紅色閃爍。沒關(guān)系!

如果第一次雙擊不起作用,請(qǐng)重試。有時(shí)可能需要一些嘗試才能使節(jié)奏正確!

您將看到一個(gè)名為 PORTALBOOT 。

將 adafruit-circuitpython-pyportal- .uf2 文件拖到 PORTALBOOT。

LED將閃爍。然后, PORTALBOOT 驅(qū)動(dòng)器將消失,并且將出現(xiàn)一個(gè)名為 CIRCUITPY 的新磁盤驅(qū)動(dòng)器。

如果未在板上添加任何代碼,唯一存在的文件是 boot_out.txt 。這是絕對(duì)正常的!是時(shí)候添加您的 code.py 并開始使用它了!

就這樣,您完成了! :)

PyPortal默認(rèn)文件

單擊下面的按鈕,下載PyPortal附帶的文件的zip。

PyPortal默認(rèn)文件

PyPortal CircuitPython設(shè)置

要在CircuitPython中使用PyPortal的所有出色功能,必須首先安裝許多庫(kù)。本頁(yè)涵蓋了該過程。

Adafruit CircuitPython捆綁包

下載Adafruit CircuitPython庫(kù)捆綁包。您可以在此處找到最新版本:

最新的Adafruit CircuitPython庫(kù)包

下載 adafruit-circuitpython-bundle-4。 x-mpy-*。zip 捆綁zip文件,然后解壓縮同名文件夾。在內(nèi)部,您會(huì)找到一個(gè) lib 文件夾。您有兩個(gè)選擇:

您可以將 lib 文件夾添加到您的 CIRCUITPY 驅(qū)動(dòng)器中。這將確保您擁有所有驅(qū)動(dòng)程序。但是這將占用8 MB磁盤上的一堆空間

根據(jù)需要添加每個(gè)庫(kù),這將減少空間使用量,但您需要

至少,我們推薦以下庫(kù),實(shí)際上我們比推薦的要多?;旧鲜潜匦璧?。因此,立即抓住它們并將它們安裝到 CIRCUITPY/lib !

adafruit_esp32spi -這是一個(gè)庫(kù),可通過ESP32進(jìn)行互聯(lián)網(wǎng)訪問使用(您猜對(duì)了?。㏒PI傳輸。 Internet所需的任何東西都需要使用它

adafruit_requests -該庫(kù)使我們能夠執(zhí)行HTTP請(qǐng)求并從服務(wù)器獲取響應(yīng)。 GET/POST/PUT/PATCH-它們都在這里!

adafruit_pyportal -這是我們友好的包裝器庫(kù),可處理很多項(xiàng)目,顯示圖形和文本,從互聯(lián)網(wǎng)上獲取數(shù)據(jù)。

adafruit_touchscreen -一個(gè)用于從電阻式觸摸屏讀取觸摸的庫(kù)。

adafruit_cursorcontrol -用于讀取PyGamer和PyBadge游戲桿和按鈕的庫(kù)。為您處理所有圖形,按鈕閱讀和操縱桿移動(dòng)。

adafruit_io -該庫(kù)有助于將PyPortal連接到我們的免費(fèi)數(shù)據(jù)記錄和查看服務(wù)

adafruit_imageload -任何圖形所需的圖像顯示助手!

adafruit_display_text -毫不奇怪,它在屏幕上顯示文本

adafruit_bitmap_font -我們擁有精美的字體支持,并且易于制作新字體。該庫(kù)讀取并解析字體文件。

adafruit_slideshow -用于制作圖像幻燈片-方便快速顯示圖形和聲音

neopixel -用于控制板載新像素

adafruit_adt7410 -用于從板載Analog Devices ADT7410精密溫度傳感器讀取溫度的庫(kù)

adafruit_sdcard -支持從板載SD卡插槽中讀取/寫入數(shù)據(jù)。

adafruit_bus_device -對(duì)I2C/SPI的低級(jí)支持

Internet連接!

一旦您安裝了CircuitPython安裝程序和庫(kù),我們就可以將您的電路板連接到Internet。請(qǐng)注意,目前不支持訪問企業(yè)級(jí)安全的WiFi網(wǎng)絡(luò),僅支持需要SSID和密碼的WiFi網(wǎng)絡(luò)。

要建立連接,您需要先創(chuàng)建一個(gè)秘密文件。

什么是機(jī)密文件?

我們希望人們?cè)跇?gòu)建CircuitPython WiFi小部件時(shí)共享大量項(xiàng)目。我們要避免的是人們不小心共享了他們的密碼或秘密令牌和API密鑰。因此,我們?cè)O(shè)計(jì)了所有示例,以使用 CIRCUITPY 驅(qū)動(dòng)器中的secrets.py文件來保存秘密/私有/自定義數(shù)據(jù)。這樣,您就可以共享您的主項(xiàng)目,而不必?fù)?dān)心意外共享私有內(nèi)容。

您的 secrets.py 文件應(yīng)如下所示:

下載:文件

復(fù)制代碼

# This file is where you keep secret settings, passwords, and tokens!

# If you put them in the code you risk committing that info or sharing it

secrets = {

‘ssid’ : ‘home ssid’,

‘password’ : ‘my password’,

‘timezone’ : “America/New_York”, # http://worldtimeapi.org/timezones

‘github_token’ : ‘fawfj23rakjnfawiefa’,

‘hackaday_token’ : ‘h4xx0rs3kret’,

}

# This file is where you keep secret settings, passwords, and tokens!

# If you put them in the code you risk committing that info or sharing it

secrets = {

‘ssid’ : ‘home ssid’,

‘password’ : ‘my password’,

‘timezone’ : “America/New_York”, # http://worldtimeapi.org/timezones

‘github_token’ : ‘fawfj23rakjnfawiefa’,

‘hackaday_token’ : ‘h4xx0rs3kret’,

}

Inside是一個(gè)名為secrets的python字典,每個(gè)條目都有一行。每個(gè)條目都有一個(gè)條目名稱(例如‘ssid’),然后是一個(gè)冒號(hào)以將其與條目鍵‘home ssid’分開,最后是一個(gè)逗號(hào),

至少您需要ssid和password用于您的本地WiFi設(shè)置。在創(chuàng)建項(xiàng)目時(shí),您可能需要更多的令牌和密鑰,只需一次添加一行即可。例如,請(qǐng)參見其他令牌,例如用于訪問github或hackaday API的令牌。其他非機(jī)密數(shù)據(jù)(例如您的時(shí)區(qū))也可以在此處,僅因?yàn)槠浞Q為機(jī)密的信息并不意味著您不能在其中包含常規(guī)的自定義數(shù)據(jù)!

有關(guān)正確的時(shí)區(qū)字符串,請(qǐng)查看http://worldtimeapi.org/timezones,請(qǐng)記住,如果未列出您的城市,請(qǐng)?jiān)谕粫r(shí)區(qū)中查找城市,例如,波士頓,紐約,費(fèi)城,華盛頓特區(qū)和邁阿密都與紐約位于同一時(shí)間。

當(dāng)然,不要共享您的 secrets.py -將其保存在GitHub,Discord或其他項(xiàng)目共享站點(diǎn)之外。

連接到WiFi

好,現(xiàn)在您已設(shè)置好機(jī)密-您可以連接到Internet。讓我們使用ESP32SPI和Requests庫(kù)-您需要訪問CircuitPython捆綁包并安裝:

adafruit_bus_device

adafruit_esp32spi

adafruit_requests

neopixel

進(jìn)入您的lib文件夾。完成后,使用Mu或您喜歡的編輯器加載以下示例:

下載:項(xiàng)目郵編或 esp32spi_simpletest.py | 在Github上查看

復(fù)制代碼

import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

print(“ESP32 SPI webclient test”)

TEXT_URL = “http://wifitest.adafruit.com/testwifi/index.html”

JSON_URL = “http://api.coindesk.com/v1/bpi/currentprice/USD.json”

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

requests.set_socket(socket, esp)

if esp.status == adafruit_esp32spi.WL_IDLE_STATUS:

print(“ESP32 found and in idle mode”)

print(“Firmware vers.”, esp.firmware_version)

print(“MAC addr:”, [hex(i) for i in esp.MAC_address])

for ap in esp.scan_networks():

print(“ %s RSSI: %d” % (str(ap[‘ssid’], ‘utf-8’), ap[‘rssi’]))

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

print(“My IP address is”, esp.pretty_ip(esp.ip_address))

print(“IP lookup adafruit.com: %s” % esp.pretty_ip(esp.get_host_by_name(“adafruit.com”)))

print(“Ping google.com: %d ms” % esp.ping(“google.com”))

#esp._debug = True

print(“Fetching text from”, TEXT_URL)

r = requests.get(TEXT_URL)

print(‘-’*40)

print(r.text)

print(‘-’*40)

r.close()

print()

print(“Fetching json from”, JSON_URL)

r = requests.get(JSON_URL)

print(‘-’*40)

print(r.json())

print(‘-’*40)

r.close()

print(“Done!”)

import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

print(“ESP32 SPI webclient test”)

TEXT_URL = “http://wifitest.adafruit.com/testwifi/index.html”

JSON_URL = “http://api.coindesk.com/v1/bpi/currentprice/USD.json”

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

requests.set_socket(socket, esp)

if esp.status == adafruit_esp32spi.WL_IDLE_STATUS:

print(“ESP32 found and in idle mode”)

print(“Firmware vers.”, esp.firmware_version)

print(“MAC addr:”, [hex(i) for i in esp.MAC_address])

for ap in esp.scan_networks():

print(“ %s RSSI: %d” % (str(ap[‘ssid’], ‘utf-8’), ap[‘rssi’]))

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

print(“My IP address is”, esp.pretty_ip(esp.ip_address))

print(“IP lookup adafruit.com: %s” % esp.pretty_ip(esp.get_host_by_name(“adafruit.com”)))

print(“Ping google.com: %d ms” % esp.ping(“google.com”))

#esp._debug = True

print(“Fetching text from”, TEXT_URL)

r = requests.get(TEXT_URL)

print(‘-’*40)

print(r.text)

print(‘-’*40)

r.close()

print()

print(“Fetching json from”, JSON_URL)

r = requests.get(JSON_URL)

print(‘-’*40)

print(r.json())

print(‘-’*40)

r.close()

print(“Done!”)

,并將其保存到您的板上,名稱為code.py。

第一個(gè)連接示例不使用機(jī)密文件-您將首先輸入SSID/密碼來驗(yàn)證連接性!

然后轉(zhuǎn)到此行

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

并更改MY_SSID_NAME和 MY_SSID_PASSWORD 設(shè)置為您的訪問點(diǎn)名稱和密碼,并將其保留在‘’引號(hào)內(nèi)。 (此示例不使用機(jī)密文件,但它也非常獨(dú)立,因此,如果其他事情似乎不起作用,則可以始終重新加載該文件。您應(yīng)該獲得如下內(nèi)容:

示例代碼。..

使用SPI端口和3個(gè)控制引腳通過SPI初始化ESP32:

下載:文件

復(fù)制代碼

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset) esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

告訴我們的requests庫(kù)我們正在使用的套接字的類型(套接字類型隨連接類型而變化-在此示例中,我們將使用adafruit_esp32spi_socket)。還將接口設(shè)置為

下載:文件

復(fù)制代碼

esp requests

驗(yàn)證找到ESP32,檢查固件和MAC地址

下載:文件

復(fù)制代碼

requests.set_socket(socket, esp) requests.set_socket(socket, esp)

掃描它可以看到的所有訪問點(diǎn),并打印出名稱和信號(hào)強(qiáng)度:

下載:文件

復(fù)制代碼

if esp.status == adafruit_esp32spi.WL_IDLE_STATUS:

print(“ESP32 found and in idle mode”)

print(“Firmware vers.”, esp.firmware_version)

print(“MAC addr:”, [hex(i) for i in esp.MAC_address]) if esp.status == adafruit_esp32spi.WL_IDLE_STATUS:

print(“ESP32 found and in idle mode”)

print(“Firmware vers.”, esp.firmware_version)

print(“MAC addr:”, [hex(i) for i in esp.MAC_address])

連接到我們?cè)诖颂幎x的AP,然后打印出來本地IP地址,嘗試進(jìn)行域名查找并ping google.com以檢查網(wǎng)絡(luò)連接(請(qǐng)注意,有時(shí)ping失敗或需要一段時(shí)間,這沒什么大不了的)

下載:文件

復(fù)制代碼

for ap in esp.scan_networks():

print(“ %s RSSI: %d” % (str(ap[‘ssid’], ‘utf-8’), ap[‘rssi’])) for ap in esp.scan_networks():

print(“ %s RSSI: %d” % (str(ap[‘ssid’], ‘utf-8’), ap[‘rssi’]))

好的,現(xiàn)在我們進(jìn)入真正有趣的部分。使用SAMD51或其他大容量RAM(超過32 KB)設(shè)備,我們可以做很多巧妙的事情。例如,我們可以像請(qǐng)求一樣實(shí)現(xiàn)一個(gè)接口,這使得獲取數(shù)據(jù)非常簡(jiǎn)單

從Web URL調(diào)用 print(“Connecting to AP.。.”)

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

print(“My IP address is”, esp.pretty_ip(esp.ip_address))

print(“IP lookup adafruit.com: %s” % esp.pretty_ip(esp.get_host_by_name(“adafruit.com”)))

print(“Ping google.com: %d ms” % esp.ping(“google.com”))

中讀取所有文本-您可以傳入 print(“Connecting to AP.。.”)

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

print(“My IP address is”, esp.pretty_ip(esp.ip_address))

print(“IP lookup adafruit.com: %s” % esp.pretty_ip(esp.get_host_by_name(“adafruit.com”)))

print(“Ping google.com: %d ms” % esp.ping(“google.com”))

用于SSL連接的URL

下載:文件

復(fù)制代碼

requests.get https

或者,如果數(shù)據(jù)使用結(jié)構(gòu)化JSON,則可以獲取json pre -解析為可以輕松查詢或遍歷的Python字典。 (同樣,僅適用于nRF52840,M4和其他高RAM板)

下載:文件

復(fù)制代碼

TEXT_URL = “http://wifitest.adafruit.com/testwifi/index.html”

print(“Fetching text from”, TEXT_URL)

r = requests.get(TEXT_URL)

print(‘-’*40)

print(r.text)

print(‘-’*40)

r.close() TEXT_URL = “http://wifitest.adafruit.com/testwifi/index.html”

print(“Fetching text from”, TEXT_URL)

r = requests.get(TEXT_URL)

print(‘-’*40)

print(r.text)

print(‘-’*40)

r.close()

Requests

我們已經(jīng)為Web接口編寫了一個(gè)類似請(qǐng)求的庫(kù),名為Adafruit_CircuitPython_Requests。該庫(kù)允許您發(fā)送HTTP/1.1請(qǐng)求,而無需“設(shè)計(jì)”它們,并提供了有用的方法來解析服務(wù)器的響應(yīng)。

下載:Project Zip 或 requests_simpletest.py | 在Github上查看

復(fù)制代碼

JSON_URL = “http://api.coindesk.com/v1/bpi/currentprice/USD.json”

print(“Fetching json from”, JSON_URL)

r = requests.get(JSON_URL)

print(‘-’*40)

print(r.json())

print(‘-’*40)

r.close() JSON_URL = “http://api.coindesk.com/v1/bpi/currentprice/USD.json”

print(“Fetching json from”, JSON_URL)

r = requests.get(JSON_URL)

print(‘-’*40)

print(r.json())

print(‘-’*40)

r.close()

代碼首先設(shè)置ESP32SPI接口。然后,它使用ESP32 # adafruit_requests usage with an esp32spi_socket

import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

# Initialize a requests object with a socket and esp32spi interface

requests.set_socket(socket, esp)

TEXT_URL = “http://wifitest.adafruit.com/testwifi/index.html”

JSON_GET_URL = “http://httpbin.org/get”

JSON_POST_URL = “http://httpbin.org/post”

print(“Fetching text from %s”%TEXT_URL)

response = requests.get(TEXT_URL)

print(‘-’*40)

print(“Text Response: ”, response.text)

print(‘-’*40)

response.close()

print(“Fetching JSON data from %s”%JSON_GET_URL)

response = requests.get(JSON_GET_URL)

print(‘-’*40)

print(“JSON Response: ”, response.json())

print(‘-’*40)

response.close()

data = ‘31F’

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, data))

response = requests.post(JSON_POST_URL, data=data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘data’ key from json_resp dict.

print(“Data received from server:”, json_resp[‘data’])

print(‘-’*40)

response.close()

json_data = {“Date” : “July 25, 2019”}

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, json_data))

response = requests.post(JSON_POST_URL, json=json_data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘json’ key from json_resp dict.

print(“JSON Data received from server:”, json_resp[‘json’])

print(‘-’*40)

response.close()

和# adafruit_requests usage with an esp32spi_socket

import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

# Initialize a requests object with a socket and esp32spi interface

requests.set_socket(socket, esp)

TEXT_URL = “http://wifitest.adafruit.com/testwifi/index.html”

JSON_GET_URL = “http://httpbin.org/get”

JSON_POST_URL = “http://httpbin.org/post”

print(“Fetching text from %s”%TEXT_URL)

response = requests.get(TEXT_URL)

print(‘-’*40)

print(“Text Response: ”, response.text)

print(‘-’*40)

response.close()

print(“Fetching JSON data from %s”%JSON_GET_URL)

response = requests.get(JSON_GET_URL)

print(‘-’*40)

print(“JSON Response: ”, response.json())

print(‘-’*40)

response.close()

data = ‘31F’

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, data))

response = requests.post(JSON_POST_URL, data=data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘data’ key from json_resp dict.

print(“Data received from server:”, json_resp[‘data’])

print(‘-’*40)

response.close()

json_data = {“Date” : “July 25, 2019”}

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, json_data))

response = requests.post(JSON_POST_URL, json=json_data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘json’ key from json_resp dict.

print(“JSON Data received from server:”, json_resp[‘json’])

print(‘-’*40)

response.close()

對(duì)象初始化request對(duì)象。

下載:文件

復(fù)制代碼

socket esp

帶有請(qǐng)求的HTTP GET

代碼向Adafruit的WiFi測(cè)試網(wǎng)站-http:/發(fā)出HTTP GET請(qǐng)求/wifitest.adafruit.com/testwifi/index.html。

為此,我們會(huì)將URL傳遞到import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

# Initialize a requests object with a socket and esp32spi interface

requests.set_socket(socket, esp)。我們還將將來自服務(wù)器的響應(yīng)保存到名為import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

# Initialize a requests object with a socket and esp32spi interface

requests.set_socket(socket, esp)的變量。

盡管我們從服務(wù)器請(qǐng)求數(shù)據(jù),但我們還是希望服務(wù)器回應(yīng)。由于我們已經(jīng)保存了服務(wù)器的requests.get(),因此可以將其讀回。對(duì)我們來說幸運(yùn)的是,請(qǐng)求將服務(wù)器的響應(yīng)自動(dòng)解碼為人類可讀的文本,您可以通過調(diào)用response將其讀回。

最后,我們將執(zhí)行一些操作通過調(diào)用response進(jìn)行清理。這樣會(huì)關(guān)閉,刪除和收集響應(yīng)的數(shù)據(jù)。

下載:文件

復(fù)制代碼

response.text response.close()

一些服務(wù)器使用文本響應(yīng),而某些服務(wù)器則使用由屬性-值對(duì)組成的json格式的數(shù)據(jù)進(jìn)行響應(yīng)。/p》

CircuitPython_Requests可以將來自服務(wù)器的JSON格式的響應(yīng)轉(zhuǎn)換為CPython print(“Fetching text from %s”%TEXT_URL)

response = requests.get(TEXT_URL)

print(‘-’*40)

print(“Text Response: ”, response.text)

print(‘-’*40)

response.close()對(duì)象。

我們還可以獲取和解析 json 數(shù)據(jù)。我們將發(fā)送HTTP Get到一個(gè)我們知道的URL,該URL返回一個(gè)json格式的響應(yīng)(而不是文本數(shù)據(jù))。

然后,代碼調(diào)用print(“Fetching text from %s”%TEXT_URL)

response = requests.get(TEXT_URL)

print(‘-’*40)

print(“Text Response: ”, response.text)

print(‘-’*40)

response.close()將響應(yīng)轉(zhuǎn)換為一個(gè)CPython dict.。

下載:文件

復(fù)制代碼

response.json() dict

帶有請(qǐng)求的HTTP POST

請(qǐng)求還可以通過調(diào)用print(“Fetching JSON data from %s”%JSON_GET_URL)

response = requests.get(JSON_GET_URL)

print(‘-’*40)

print(“JSON Response: ”, response.json())

print(‘-’*40)

response.close()方法(向其傳遞一個(gè)print(“Fetching JSON data from %s”%JSON_GET_URL)

response = requests.get(JSON_GET_URL)

print(‘-’*40)

print(“JSON Response: ”, response.json())

print(‘-’*40)

response.close()值)將數(shù)據(jù)發(fā)布到服務(wù)器。

下載:文件

復(fù)制代碼

requests.post data

您還可以通過將data = ‘31F’

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, data))

response = requests.post(JSON_POST_URL, data=data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘data’ key from json_resp dict.

print(“Data received from server:”, json_resp[‘data’])

print(‘-’*40)

response.close()傳遞到data = ‘31F’

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, data))

response = requests.post(JSON_POST_URL, data=data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘data’ key from json_resp dict.

print(“Data received from server:”, json_resp[‘data’])

print(‘-’*40)

response.close()方法中,將json格式的數(shù)據(jù)發(fā)布到服務(wù)器。

下載:文件

復(fù)制代碼

json_data requests.post

高級(jí)請(qǐng)求使用情況

要發(fā)送自定義HTTP, aders,將響應(yīng)解析為原始字節(jié)還是在CircuitPython代碼中處理響應(yīng)的http狀態(tài)代碼?

我們已經(jīng)編寫了一個(gè)示例來顯示下面的請(qǐng)求模塊的高級(jí)用法。

下載:項(xiàng)目Zip 或 requests_advanced.py | 在Github上查看

復(fù)制代碼

json_data = {“Date” : “July 25, 2019”}

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, json_data))

response = requests.post(JSON_POST_URL, json=json_data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘json’ key from json_resp dict.

print(“JSON Data received from server:”, json_resp[‘json’])

print(‘-’*40)

response.close()

json_data = {“Date” : “July 25, 2019”}

print(“POSTing data to {0}: {1}”.format(JSON_POST_URL, json_data))

response = requests.post(JSON_POST_URL, json=json_data)

print(‘-’*40)

json_resp = response.json()

# Parse out the ‘json’ key from json_resp dict.

print(“JSON Data received from server:”, json_resp[‘json’])

print(‘-’*40)

response.close()

WiFi Manager

這個(gè)最簡(jiǎn)單的示例可行,但有點(diǎn)挑剔-您需要不斷檢查WiFi狀態(tài),并具有許多循環(huán)來管理連接和斷開連接。對(duì)于更高級(jí)的用途,我們建議使用WiFiManager對(duì)象。它將為您包裝連接/狀態(tài)/請(qǐng)求循環(huán)-如果WiFi掉線,則重新連接,如果ESP32進(jìn)入不良狀態(tài),則重置ESP32,等等。

這是一個(gè)更高級(jí)的示例,其中顯示了WiFi管理器以及如何使用一些額外的標(biāo)題發(fā)布數(shù)據(jù):

下載:Project Zip 或 esp32spi_aio_post.py | 在Github上查看

復(fù)制代碼

import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

# Initialize a requests object with a socket and esp32spi interface

requests.set_socket(socket, esp)

JSON_GET_URL = “http://httpbin.org/get”

# Define a custom header as a dict.

headers = {“user-agent” : “blinka/1.0.0”}

print(“Fetching JSON data from %s.。.”%JSON_GET_URL)

response = requests.get(JSON_GET_URL, headers=headers)

print(‘-’*60)

json_data = response.json()

headers = json_data[‘headers’]

print(“Response‘s Custom User-Agent Header: {0}”.format(headers[’User-Agent‘]))

print(’-‘*60)

# Read Response’s HTTP status code

print(“Response HTTP Status Code: ”, response.status_code)

print(‘-’*60)

# Read Response, as raw bytes instead of pretty text

print(“Raw Response: ”, response.content)

# Close, delete and collect the response data

response.close()

import board

import busio

from digitalio import DigitalInOut

import adafruit_esp32spi.adafruit_esp32spi_socket as socket

from adafruit_esp32spi import adafruit_esp32spi

import adafruit_requests as requests

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

print(“Connecting to AP.。.”)

while not esp.is_connected:

try:

esp.connect_AP(b‘MY_SSID_NAME’, b‘MY_SSID_PASSWORD’)

except RuntimeError as e:

print(“could not connect to AP, retrying: ”,e)

continue

print(“Connected to”, str(esp.ssid, ‘utf-8’), “ RSSI:”, esp.rssi)

# Initialize a requests object with a socket and esp32spi interface

requests.set_socket(socket, esp)

JSON_GET_URL = “http://httpbin.org/get”

# Define a custom header as a dict.

headers = {“user-agent” : “blinka/1.0.0”}

print(“Fetching JSON data from %s.。.”%JSON_GET_URL)

response = requests.get(JSON_GET_URL, headers=headers)

print(‘-’*60)

json_data = response.json()

headers = json_data[‘headers’]

print(“Response‘s Custom User-Agent Header: {0}”.format(headers[’User-Agent‘]))

print(’-‘*60)

# Read Response’s HTTP status code

print(“Response HTTP Status Code: ”, response.status_code)

print(‘-’*60)

# Read Response, as raw bytes instead of pretty text

print(“Raw Response: ”, response.content)

# Close, delete and collect the response data

response.close()

您會(huì)在這里注意到,我們使用secrets.py文件來管理我們的SSID信息。 wifimanager被賦予了ESP32對(duì)象,密碼和一個(gè)用于指示狀態(tài)的新像素。

請(qǐng)注意,您需要在密碼文件中添加一些其他信息,以便代碼可以查詢Adafruit IO API:

import time

import board

import busio

from digitalio import DigitalInOut

import neopixel

from adafruit_esp32spi import adafruit_esp32spi

from adafruit_esp32spi import adafruit_esp32spi_wifimanager

print(“ESP32 SPI webclient test”)

# Get wifi details and more from a secrets.py file

try:

from secrets import secrets

except ImportError:

print(“WiFi secrets are kept in secrets.py, please add them there!”)

raise

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

“”“Use below for Most Boards”“”

status_light = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2) # Uncomment for Most Boards

“”“Uncomment below for ItsyBitsy M4”“”

# status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)

# Uncomment below for an externally defined RGB LED

# import adafruit_rgbled

# from adafruit_esp32spi import PWMOut

# RED_LED = PWMOut.PWMOut(esp, 26)

# GREEN_LED = PWMOut.PWMOut(esp, 27)

# BLUE_LED = PWMOut.PWMOut(esp, 25)

# status_light = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)

wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)

counter = 0

while True:

try:

print(“Posting data.。.”, end=‘’)

data = counter

feed = ‘test’

payload = {‘value’:data}

response = wifi.post(

“https://io.adafruit.com/api/v2/”+secrets[‘a(chǎn)io_username’]+“/feeds/”+feed+“/data”,

json=payload,

headers={“X-AIO-KEY”:secrets[‘a(chǎn)io_key’]})

print(response.json())

response.close()

counter = counter + 1

print(“OK”)

except (ValueError, RuntimeError) as e:

print(“Failed to get data, retrying ”, e)

wifi.reset()

continue

response = None

time.sleep(15)

import time

import board

import busio

from digitalio import DigitalInOut

import neopixel

from adafruit_esp32spi import adafruit_esp32spi

from adafruit_esp32spi import adafruit_esp32spi_wifimanager

print(“ESP32 SPI webclient test”)

# Get wifi details and more from a secrets.py file

try:

from secrets import secrets

except ImportError:

print(“WiFi secrets are kept in secrets.py, please add them there!”)

raise

# If you are using a board with pre-defined ESP32 Pins:

esp32_cs = DigitalInOut(board.ESP_CS)

esp32_ready = DigitalInOut(board.ESP_BUSY)

esp32_reset = DigitalInOut(board.ESP_RESET)

# If you have an externally connected ESP32:

# esp32_cs = DigitalInOut(board.D9)

# esp32_ready = DigitalInOut(board.D10)

# esp32_reset = DigitalInOut(board.D5)

spi = busio.SPI(board.SCK, board.MOSI, board.MISO)

esp = adafruit_esp32spi.ESP_SPIcontrol(spi, esp32_cs, esp32_ready, esp32_reset)

“”“Use below for Most Boards”“”

status_light = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.2) # Uncomment for Most Boards

“”“Uncomment below for ItsyBitsy M4”“”

# status_light = dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1, brightness=0.2)

# Uncomment below for an externally defined RGB LED

# import adafruit_rgbled

# from adafruit_esp32spi import PWMOut

# RED_LED = PWMOut.PWMOut(esp, 26)

# GREEN_LED = PWMOut.PWMOut(esp, 27)

# BLUE_LED = PWMOut.PWMOut(esp, 25)

# status_light = adafruit_rgbled.RGBLED(RED_LED, BLUE_LED, GREEN_LED)

wifi = adafruit_esp32spi_wifimanager.ESPSPI_WiFiManager(esp, secrets, status_light)

counter = 0

while True:

try:

print(“Posting data.。.”, end=‘’)

data = counter

feed = ‘test’

payload = {‘value’:data}

response = wifi.post(

“https://io.adafruit.com/api/v2/”+secrets[‘a(chǎn)io_username’]+“/feeds/”+feed+“/data”,

json=payload,

headers={“X-AIO-KEY”:secrets[‘a(chǎn)io_key’]})

print(response.json())

response.close()

counter = counter + 1

print(“OK”)

except (ValueError, RuntimeError) as e:

print(“Failed to get data, retrying ”, e)

wifi.reset()

continue

response = None

time.sleep(15)

您可以轉(zhuǎn)到adafruit.io查看AIO密鑰鏈接獲取這兩個(gè)值并將它們添加到secrets文件中,該文件現(xiàn)在看起來像這樣:

下載:文件

復(fù)制代碼

aio_username aio_key

下一步,設(shè)置一個(gè)名為Adafruit IO提要# This file is where you keep secret settings, passwords, and tokens!

# If you put them in the code you risk committing that info or sharing it

secrets = {

‘ssid’ : ‘_your_ssid_’,

‘password’ : ‘_your_wifi_password_’,

‘timezone’ : “America/Los_Angeles”, # http://worldtimeapi.org/timezones

‘a(chǎn)io_username’ : ‘_your_aio_username_’,

‘a(chǎn)io_key’ : ‘_your_aio_key_’,

}

如果您不知道如何設(shè)置供稿,請(qǐng)遵循此頁(yè)面并在設(shè)置名為。

然后,我們可以有一個(gè)簡(jiǎn)單的循環(huán),用于將數(shù)據(jù)發(fā)布到Adafruit IO,而無需處理連接或初始化硬件!

在Adafruit.io上查看您的測(cè)試數(shù)據(jù),每次Cir時(shí),您都會(huì)看到該值增加cuitPython板向其發(fā)布數(shù)據(jù)!

在CircuitPython中為新的新查看器編碼

Adafruit產(chǎn)品API

與PyPortal上的大多數(shù)IoT項(xiàng)目一樣,我們能夠通過REST應(yīng)用程序編程接口(API)請(qǐng)求的奇妙功能來進(jìn)行動(dòng)態(tài)數(shù)據(jù)和圖像收集,該請(qǐng)求會(huì)返回一個(gè)JSON文件。

Adafruit產(chǎn)品API使我們可以輕松地請(qǐng)求有關(guān)產(chǎn)品的基本信息,包括其名稱,產(chǎn)品URL和產(chǎn)品圖片。

Adafruit IO圖像轉(zhuǎn)換器服務(wù)器

為了使用Adafruit圖像轉(zhuǎn)換器,此項(xiàng)目將要求您具有Adafruit IO用戶名和密鑰。 Adafruit IO是絕對(duì)免費(fèi)的,但是您需要使用Adafruit帳戶登錄才能使用它。如果您還沒有Adafruit登錄名,請(qǐng)?jiān)诖颂巹?chuàng)建一個(gè)登錄名。

如果您以前從未使用過Adafruit IO,請(qǐng)查看本指南以獲取更多信息。

登錄到您的帳戶后,您需要在 secrets.py 文件中放置以下兩項(xiàng)信息: Adafruit IO用戶名和 Adafruit IO鍵。前往io.adafruit.com,只需點(diǎn)擊Adafruit IO頁(yè)面左側(cè)的查看AIO密鑰鏈接即可獲取此信息。

然后將它們添加到 secrets.py 文件,例如:

下載:文件

復(fù)制代碼

secrets = {

‘ssid’ : ‘your_wifi_ssid’,

‘password : ’your_wifi_password‘,

’aio_username‘ : ’your_aio_username‘,

’aio_key‘ : ’your_big_huge_super_long_aio_key‘

} secrets = {

’ssid‘ : ’your_wifi_ssid‘,

’password : ‘your_wifi_password’,

‘a(chǎn)io_username’ : ‘your_aio_username’,

‘a(chǎn)io_key’ : ‘your_big_huge_super_long_aio_key’

}

此時(shí),請(qǐng)確保您的WiFi SSID和密碼也位于 secrets.py中。 。設(shè)置時(shí)只需執(zhí)行一次。如果將PyPortal移到其他WiFi服務(wù)位置,請(qǐng)使用文本編輯器在此文件中輸入新值。

添加CircuitPython代碼和資產(chǎn)

在下面的嵌入式代碼元素中,單擊下載:Project Zip 鏈接,然后將.zip存檔文件保存到您的計(jì)算機(jī)。

然后解壓縮.zip文件,它將解壓縮到名為 PyPortal_NewNewNew 的文件夾中。

將 PyPortal_NewNewNew 目錄的內(nèi)容復(fù)制到PyPortal的 CIRCUITPY 驅(qū)動(dòng)器中,然后確保將 newnewnew.py 文件重命名為 code.py ,因此它將在PyPortal重新啟動(dòng)時(shí)自動(dòng)運(yùn)行。

編輯代碼

您可以使用任何文本編輯器來編輯 code.py 文件你喜歡嗎Adafruit建議安裝免費(fèi)的Mu Python編輯器,因?yàn)樗?jí)方便,可以識(shí)別Adafruit板,并具有內(nèi)置的串行監(jiān)視器/REPL以與板交互。在此處找到有關(guān)Mu的更多信息。

啟動(dòng).py

我們使用一個(gè)特殊文件來確保.bmp緩存正確寫入閃存。這是您復(fù)制到驅(qū)動(dòng)器的 unsafe_boot.py 文件?,F(xiàn)在將其重命名為 boot.py 。然后,按PyPortal上的Reset(重置)按鈕。

請(qǐng)注意,重新啟動(dòng)過程中會(huì)出現(xiàn)這種看上去恐怖的文本,請(qǐng)不要擔(dān)心,它應(yīng)該是這樣說的!

****************警告******************

使用文件系統(tǒng)作為可寫緩存!

這是冒險(xiǎn)行為,請(qǐng)備份您的文件!

************** **警告******************

這是 CIRCUITPY 驅(qū)動(dòng)器的最終內(nèi)容看起來像:

下載:項(xiàng)目Zip 或 newnewnew.py | 在Github上查看

復(fù)制代碼

import time

import board

import adafruit_pyportal

# We can cycle through the latest featured products

#PRODUCTS_TYPE = “featured”

#or we can view the latest new products

PRODUCTS_TYPE = “new”

# Set up where we‘ll be fetching data from

DATA_SOURCE = “https://www.adafruit.com/api/products?format=micro&”+PRODUCTS_TYPE+“=1&random=1”

# What data we’ll be viewing

IMAGE_LOCATION = [0, “image”]

NAME_LOCATION = [0, “name”]

URL_LOCATION = [0, “url”]

# determine the current working directory needed so we know where to find files

cwd = (“/”+__file__).rsplit(‘/’, 1)[0]

pyportal = adafruit_pyportal.PyPortal(url=DATA_SOURCE,

json_path=(NAME_LOCATION, URL_LOCATION),

status_neopixel=board.NEOPIXEL,

default_bg=cwd+“/new_background.bmp”,

text_font=cwd+“/fonts/Arial-Bold-12.bdf”,

text_position=((5, 35), (5, 225)),

text_color=(0xFFFFFF, 0xFFFFFF),

text_wrap=(35, 35), # characters to wrap

image_json_path=IMAGE_LOCATION,

image_resize=(320, 240),

image_position=(0, 0))

pyportal.preload_font()

while True:

response = None

try:

response = pyportal.fetch()

print(“Response is”, response)

except (IndexError, RuntimeError, ValueError) as e:

print(“Some error occured, retrying! -”, e)

time.sleep(60)

import time

import board

import adafruit_pyportal

# We can cycle through the latest featured products

#PRODUCTS_TYPE = “featured”

#or we can view the latest new products

PRODUCTS_TYPE = “new”

# Set up where we‘ll be fetching data from

DATA_SOURCE = “https://www.adafruit.com/api/products?format=micro&”+PRODUCTS_TYPE+“=1&random=1”

# What data we’ll be viewing

IMAGE_LOCATION = [0, “image”]

NAME_LOCATION = [0, “name”]

URL_LOCATION = [0, “url”]

# determine the current working directory needed so we know where to find files

cwd = (“/”+__file__).rsplit(‘/’, 1)[0]

pyportal = adafruit_pyportal.PyPortal(url=DATA_SOURCE,

json_path=(NAME_LOCATION, URL_LOCATION),

status_neopixel=board.NEOPIXEL,

default_bg=cwd+“/new_background.bmp”,

text_font=cwd+“/fonts/Arial-Bold-12.bdf”,

text_position=((5, 35), (5, 225)),

text_color=(0xFFFFFF, 0xFFFFFF),

text_wrap=(35, 35), # characters to wrap

image_json_path=IMAGE_LOCATION,

image_resize=(320, 240),

image_position=(0, 0))

pyportal.preload_font()

while True:

response = None

try:

response = pyportal.fetch()

print(“Response is”, response)

except (IndexError, RuntimeError, ValueError) as e:

print(“Some error occured, retrying! -”, e)

time.sleep(60)

工作方式

“ New New New Product Viewer”的工作方式如下:首先,啟動(dòng)時(shí),它會(huì)按照 secrets.py 文件中指定(并經(jīng)過身份驗(yàn)證)的方式連接到您的Wifi接入點(diǎn)。

背景閃屏

下一步,它會(huì)顯示 new_background.bmp 圖片文件啟動(dòng)屏幕。這是 .bmp 格式的320x240像素RGB 16位光柵圖形。

JSON

為了檢索圖像,我們將查詢Adafruit產(chǎn)品API

發(fā)出服務(wù)器請(qǐng)求時(shí),您將獲得一個(gè)返回的JSON文件作為響應(yīng)。

實(shí)際上,您可以運(yùn)行與PyPortal相同的查詢來看到結(jié)果。復(fù)制此鏈接https://www.adafruit.com/api/products?format=micro&NEW=1&random=1并將其粘貼到瀏覽器中。

在網(wǎng)絡(luò)瀏覽器中輸入該鏈接時(shí),您會(huì)看到返回的結(jié)果是這樣的(返回的產(chǎn)品是隨機(jī)的,因此您可能會(huì)看到與此不同的文件):

下載:文件

復(fù)制代碼

{

“id”: 3315,

“name”: “TFT FeatherWing - 2.4” 320x240 Touchscreen For All Feathers“,

”description“: ”A Feather board without ambition is a Feather board without FeatherWings! Spice up your Feather project with a beautiful 2.4“ touchscreen display shield with built in microSD card socket. This TFT display is 2.4” diagonal with a bright 4 white-LED backlight. You get 240x320 pixels with individual 16-bit color pixel control. It has way more resolution than a black and white 128x64 display. As a bonus, this display comes with a resistive touchscreen attached to it already, so you can detect f.。.“,

”url“: ”http://adafru.it/3315“,

”image“: ”https://cdn-shop.adafruit.com/640x480/3315-03.jpg“

}

] [

{

”id“: 3315,

”name“: ”TFT FeatherWing - 2.4“ 320x240 Touchscreen For All Feathers”,

“description”: “A Feather board without ambition is a Feather board without FeatherWings! Spice up your Feather project with a beautiful 2.4” touchscreen display shield with built in microSD card socket. This TFT display is 2.4“ diagonal with a bright 4 white-LED backlight. You get 240x320 pixels with individual 16-bit color pixel control. It has way more resolution than a black and white 128x64 display. As a bonus, this display comes with a resistive touchscreen attached to it already, so you can detect f.。.”,

“url”: “http://adafru.it/3315”,

“image”: “https://cdn-shop.adafruit.com/640x480/3315-03.jpg”

}

結(jié)果是一個(gè)JSON(JavaScript對(duì)象表示法)數(shù)組。它由具有五個(gè) key:value 對(duì)的單個(gè)元素組成。例如,有一個(gè)名為name的鍵,它的值為“TFT FeatherWing - 2.4” 320x240 Touchscreen For All Feathers“

,表示為:

”name“: ”“TFT FeatherWing - 2.4” 320x240 Touchscreen For All Feathers“”

由于此JSON對(duì)象數(shù)組具有一致的方式將結(jié)果返回給我們,因此我們?cè)赑yPortal上運(yùn)行的代碼可以

image 鍵可以很容易地解析數(shù)據(jù)并顯示它!值:“https://cdn-shop.adafruit.com/640x480/3315-03.jpg”

以下是該網(wǎng)址上的圖片:

我們還獲得了url 鍵,這是將在屏幕底部顯示的簡(jiǎn)短URL,在這種情況下,“http://adafru.it/3315”

您可以在 code.py 的這一部分中看到它的完成方式:

下載:文件

復(fù)制代碼

DATA_SOURCE = “https://www.adafruit.com/api/products?format=micro&”+PRODUCTS_TYPE+“=1&random=1”

# What data we‘ll be viewing

IMAGE_LOCATION = [0, “image”]

NAME_LOCATION = [0, “name”]

URL_LOCATION = [0, “url”] DATA_SOURCE = “https://www.adafruit.com/api/products?format=micro&”+PRODUCTS_TYPE+“=1&random=1”

# What data we’ll be viewing

IMAGE_LOCATION = [0, “image”]

NAME_LOCATION = [0, “name”]

URL_LOCATION = [0, “url”]

然后,在pyportal查詢中,我們從該URL要求 image 名稱以獲取.jpe的路徑。 g圖片文件,以及 name 和 url 值。

下載:文件

復(fù)制代碼

pyportal = adafruit_pyportal.PyPortal(url=DATA_SOURCE,

json_path=(NAME_LOCATION, URL_LOCATION),

status_neopixel=board.NEOPIXEL,

default_bg=cwd+“/new_background.bmp”,

text_font=cwd+“/fonts/Arial-Bold-12.bdf”,

text_position=((5, 35), (5, 225)),

text_color=(0xFFFFFF, 0xFFFFFF),

text_wrap=(35, 35), # characters to wrap

image_json_path=IMAGE_LOCATION,

image_resize=(320, 240),

image_position=(0, 0)) pyportal = adafruit_pyportal.PyPortal(url=DATA_SOURCE,

json_path=(NAME_LOCATION, URL_LOCATION),

status_neopixel=board.NEOPIXEL,

default_bg=cwd+“/new_background.bmp”,

text_font=cwd+“/fonts/Arial-Bold-12.bdf”,

text_position=((5, 35), (5, 225)),

text_color=(0xFFFFFF, 0xFFFFFF),

text_wrap=(35, 35), # characters to wrap

image_json_path=IMAGE_LOCATION,

image_resize=(320, 240),

image_position=(0, 0))

在while True:的主循環(huán)中,代碼將查詢頁(yè)面中的JSON數(shù)據(jù)。

當(dāng)它獲取.jpeg文件的路徑時(shí),pyportal庫(kù)會(huì)將其傳遞給Adafruit IO映像轉(zhuǎn)換器服務(wù)器,將文件轉(zhuǎn)換為PyPortal可以顯示的格式,即320x240像素RGB 16位.bmp。

然后將該圖像緩存到PyPortal的存儲(chǔ)中,并顯示在PyPortal TFT屏幕上。

然后,使用指定的字體,顏色和PyPortal構(gòu)造函數(shù)中的位置,在圖像背景的頂部繪制 name 和 url 值的文本。

注意,我們還要指定text_wrap的數(shù)量,以便文本不會(huì)被截?cái)唷?/p>

此消息每分鐘更新一次,因此您的“新新新”保持新新??!
責(zé)任編輯:wv

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