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1.3 What Data is Transferred between APP & Pico？

1. From APP to Pico

   Let’s take a look at what kind of data Pico will get from the APP. Print data directly in on_receive.

   Note

   • Open the 1.3_ws_test_print.py file under the path of euler-kit\esp8266 or copy this code into Thonny, then click “Run Current Script” or simply press F5 to run it.

   • Don’t forget to click on the “MicroPython (Raspberry Pi Pico)” interpreter in the bottom right corner.

   • For detailed tutorials, please refer to Open and Run Code Directly.

     • Each time you rerun the code, you need to connect your device’s Wi-Fi to my_esp8266, then turn on SunFounder Controller and reconnect.

   from ws import WS_Server
   import json
   import time
   
   NAME = 'my_esp8266'
   
   ## Client Mode
   # WIFI_MODE = "sta"
   # SSID = "YOUR SSID HERE"
   # PASSWORD = "YOUR PASSWORD HERE"
   
   ## AP Mode
   WIFI_MODE = "ap"
   SSID = ""
   PASSWORD = "12345678"
   
   
   ws = WS_Server(name=NAME, mode=WIFI_MODE, ssid=SSID, password=PASSWORD)
   ws.start()
   
   def on_receive(data):
       print(data)
   
       # output
   
       # input
   
   ws.on_receive = on_receive
   
   def main():
       print("start")
       while True:
           ws.loop()
   
   main()
   

   You will see the data for each area in the Shell. When we drag the Slider in the H area, the value of the H area will change. This is because we only add one control widget (H area). The widget in the G area is not used for control but only for show.

   

   We can also add other control widgets, and use the same method to view the values ​​sent by these widgets to Pico.

   You can get the value of the corresponding widget by just using the label. As shown below, print the value of the H widget:

   Note

   • Open the 1.3_ws_test_print_h.py file under the path of euler-kit\esp8266 or copy this code into Thonny, then click “Run Current Script” or simply press F5 to run it.

   • Don’t forget to click on the “MicroPython (Raspberry Pi Pico)” interpreter in the bottom right corner.

   • For detailed tutorials, please refer to Open and Run Code Directly.

     • Each time you rerun the code, you need to connect your device’s Wi-Fi to my_esp8266, then turn on SunFounder Controller and reconnect.

   from ws import WS_Server
   import json
   import time
   
   NAME = 'my_esp8266'
   
   ## Client Mode
   # WIFI_MODE = "sta"
   # SSID = "YOUR SSID HERE"
   # PASSWORD = "YOUR PASSWORD HERE"
   
   ## AP Mode
   WIFI_MODE = "ap"
   SSID = ""
   PASSWORD = "12345678"
   
   
   ws = WS_Server(name=NAME, mode=WIFI_MODE, ssid=SSID, password=PASSWORD)
   ws.start()
   
   
   def on_receive(data):
       print(data['H'])
   
       # output
   
       # input
   
   
   ws.on_receive = on_receive
   
   def main():
       print("start")
       while True:
           ws.loop()
   
   main()
   

   >>> %Run -c $EDITOR_CONTENT
       Connecting
       WebServer started on ws://192.168.4.1:8765
       start
       Connected from 192.168.4.3
       34
       50
       87
   

2. From Pico to APP

   Use the send_dict function to show the value in G Widget.

   Note

   • Open the 1.3_ws_test_input.py file under the path of euler-kit\esp8266 or copy this code into Thonny, then click “Run Current Script” or simply press F5 to run it.

   • Don’t forget to click on the “MicroPython (Raspberry Pi Pico)” interpreter in the bottom right corner.

   • For detailed tutorials, please refer to Open and Run Code Directly.

     • Each time you rerun the code, you need to connect your device’s Wi-Fi to my_esp8266, then turn on SunFounder Controller and reconnect.

   from ws import WS_Server
   import json
   import time
   
   NAME = 'my_esp8266'
   
   ## Client Mode
   # WIFI_MODE = "sta"
   # SSID = "YOUR SSID HERE"
   # PASSWORD = "YOUR PASSWORD HERE"
   
   ## AP Mode
   WIFI_MODE = "ap"
   SSID = ""
   PASSWORD = "12345678"
   
   
   ws = WS_Server(name=NAME, mode=WIFI_MODE, ssid=SSID, password=PASSWORD)
   ws.start()
   
   led = machine.PWM(machine.Pin(15))
   led.freq(1000)
   potentiometer = machine.ADC(28)
   
   def on_receive(data):
   
       # output
   
       # input
       value=potentiometer.read_u16()
       ws.send_dict['G'] = value # the value show on the G area
   
   
   ws.on_receive = on_receive
   
   def main():
       print("start")
       while True:
           ws.loop()
   
   main()
   

   After running the code, turn the potentiometer and you will be able to see the value of the G widget change.

3. Widget List

• Control Widgets

• Show Widgets