PyBadge Wi-Fi
This post contains instructions on how to get an Adafruit PyBadge connecting to Wi-Fi using an Adafruit Airlift FeatherWing.
The code here can also be used to connect a PyPortal to Wi-Fi using the built in ESP32 chip
Hardware
An Adafruit PyBadge - this is a Circuit Python device that has a display and controllers similar to a game console. Out of the box it doesn't have Wi-Fi connectivity, but it does have a FeatherWing socket on the back to plug in add-on boards.
An Adafruit Airlift FeatherWing - this is an ESP32 based Wi-Fi add-on board for Adafruit devices. It comes with headers, and when soldered on can plug into the FeatherWing socket on the back of the PyBadge.
Assembling the hardware
-
Solder the headers to the Airlift FeatherWing
-
Plug the FeatherWing into the socket on the back of the PyBadge
Connect the PyBadge to your computer via the USB socket
Software
The software to connect to the Wi-Fi needs some Adafruit Circuit Python libraries, as well as some custom code. You can find the code on my GitHub.
Install the Adafruit libraries
Head to the Circuit Python Releases on the Adafruit GitHub repo
Download the latest version of the libraries for the version of Circuit Python you are using
Unzip the downloaded file if necessary
Locate the PyBadge on your computer. It should be mounted as a drive called
CIRCUITPYTHON
Inside the PyBadge folder, open the
lib
folder-
Copy the following files/folders from the downloaded Circuit Python libraries to the
lib
folder on the PyBadgeName Type adafruit_bus_device
Folder adafruit_esp32spi
Folder adafruit_requests.mpy
File
Define a secrets file with Wi-Fi details
Rather than encode Wi-Fi connection details in code, it is better to put them in a separate file that can be hidden from source code control, either by adding it to your gitignore
, or by hiding changes using this technique.
Create a file called
secrets.py
in the root of theCIRCUITPYTHON
folder.-
Add the following to this file
secrets = { 'ssid' : '<SSID of your Wi-Fi>', # Keep the two '' quotes around the name 'password' : '<Password>', # Keep the two '' quotes around password }
Set
<SSID of your Wi-Fi>
to be the SSID of your Wi-FiSet
<Password>
to be the password for your Wi-Fi
Connect to the Wi-Fi
Create a new file in the root of the
CIRCUITPYTHON
folder calledconnection.py
-
Add the following code to this file. You can find this file my GitHub if you just want to copy it to your PyBadge
import board, busio from secrets import secrets from digitalio import DigitalInOut import adafruit_requests as requests import adafruit_esp32spi.adafruit_esp32spi_socket as socket from adafruit_esp32spi import adafruit_esp32spi class Connection: def __connect(self, spi, cs, ready, reset, log): esp = adafruit_esp32spi.ESP_SPIcontrol(spi, cs, ready, reset) requests.set_socket(socket, esp) if log: print("Connecting to AP...") while not esp.is_connected: try: esp.connect_AP(secrets['ssid'], secrets['password']) except RuntimeError as e: if log: print("could not connect to AP, retrying: ",e) continue if log: print("Connected to", str(esp.ssid, 'utf-8'), "\tRSSI:", esp.rssi) print("My IP address is", esp.pretty_ip(esp.ip_address)) # Connect a PyPortal def connect_pyportal(self, spi, log = False): esp32_cs = DigitalInOut(board.ESP_CS) esp32_ready = DigitalInOut(board.ESP_BUSY) esp32_reset = DigitalInOut(board.ESP_RESET) self.__connect(spi, esp32_cs, esp32_ready, esp32_reset, log) # Connect a PyBadge def connect_pybadge(self, spi, log = False): esp32_cs = DigitalInOut(board.D13) esp32_ready = DigitalInOut(board.D11) esp32_reset = DigitalInOut(board.D12) self.__connect(spi, esp32_cs, esp32_ready, esp32_reset, log)
-
Add the following code to the
code.py
file in theCIRCUITPYTHON
folder. This file should already be there as part of the default install, but if it is not there, create it. This file is run when the PyBadge boots up.
import board import busio import adafruit_requests as requests from connection import Connection spi = busio.SPI(board.SCK, board.MOSI, board.MISO) conn = Connection() conn.connect_pybadge(spi, True) 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() print("Done!")
This code uses the
Connection
module to connect to Wi-Fi, then downloads some test to show that it is working. -
Save the file. The PyBadge will reboot and connect to the Wi-Fi. You will see the connection on the PyBadge screen and in your terminal if you are connected to the serial output.
Press any key to enter the REPL. Use CTRL-D to reload.soft reboot Auto-reload is on. Simply save files over USB to run them or enter REPL to disable. code.py output: Connecting to AP... Connected to <SSID> RSSI: -52 My IP address is 192.168.197.188 Fetching text from http://wifitest.adafruit.com/testwifi/index.html ---------------------------------------- This is a test of Adafruit WiFi! If you can read this, its working :) ---------------------------------------- Done!
Top comments (1)
Curious what the battery life is like (and what rating battery you might have used) if the PyBadge is using Wi-Fi often? I guess one option is to only have it connect and grab new info from the interwebs if a button is pressed.