Connect the APC220 radio module and submit the data to Internet

From wikiluntti

Introduction

Theory

Connecting

Use 3.3V on do not use EN pin on APC220. Need to connect only Vin (3.3V), GND, RX and perhaps TX.

See the image on https://www.etechnophiles.com/raspberry-pi-1-gpio-pinout-schematic-and-specs-in-detail/

Pins (from Wikipedia)

GPIO# 2nd func. Pin# Pin# 2nd func. GPIO#
+3.3 V 1 2 +5 V
2 SDA1 (I2C) 3 4 +5 V
3 SCL1 (I2C) 5 6 GND
4 GCLK 7 8 TXD0 (UART) 14
GND 9 10 RXD0 (UART) 15
17 GEN0 11 12 GEN1 18
27 GEN2 13 14 GND
22 GEN3 15 16 GEN4 23
+3.3 V 17 18 GEN5 24
10 MOSI (SPI) 19 20 GND
9 MISO (SPI) 21 22 GEN6 25
11 SCLK (SPI) 23 24 CE0_N (SPI) 8
GND 25 26 CE1_N (SPI) 7

Coding

  • HDMI console
  • Serial console via UART cable

Uart: Universal Asynchronous Receiver-Transmitter.

Enable UART using raspi-config or using /boot/config.txt: Is is better to disable serial console in raspi-config??

  • 3 Interface Options -> P6 Serial port; OR
  • Advanced options -> Serial -> Yes, reboot.

Enable UART: 

The serial login shell is disabled
The serial interface is enabled



/boot/config.txt

add line 

enable_uart=1

Reboot. 

dmesg | grep tty

Set the Baud rate to 9600 bps. 

cat /dev/serial0

The UART device on the Pi is /dev/ttyAMA0. 


python3 -m serial.tools.miniterm /dev/serial0 9600



#!/usr/bin/env python
import time
import serial

ser = serial.Serial(
        port='/dev/ttyUSB0',
        baudrate = 9600,
        parity=serial.PARITY_NONE,
        stopbits=serial.STOPBITS_ONE,
        bytesize=serial.EIGHTBITS,
        timeout=1
)
while True:
        x=ser.readline()
        print x,



sudo python serial_read.py

Use UART using Python.

References

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