tomasinouk

import board
import busio
import digitalio
import time


uart = busio.UART(board.SARA_TX,board.SARA_RX,rts=board.SARA_RTS, cts=board.SARA_CTS, baudrate=115200,timeout=5)

tomasinouk

I have done this on Challenger LTE board link, which is RP2040 based.

You need to enable data serial at boot (boot.py), this is disabled by default. When the board boots you need to run file serial_passthrough.py the program.

Your computer will report new COM/Serial port. Use that to talk with the device connected to uart of the CircuitPython board.

Create files on CIRCUITPY

file: boot.py

tomasinouk

PHONE1=+61423207744
PHONE2=+6141038#####

BIN0_TEXT_OUT_OFF="OUT_0 is set to 1"
BIN0_TEXT_OUT_ON="OUT_0 is set to 0"

for i in $PHONE1 $PHONE2; do
    logger -t "SMS_COMMAND" "Have these phone no $i"
done