SIM7080G-NB-IoT-Cat-M-LTE-GPS

Project repository for working with SIM7080G Multi-Band CAT-M and NB-IoT module

documentation and references:
https://www.simcom.com/product/SIM7080G.html https://www.waveshare.com/wiki/SIM7080G_Cat-M/NB-IoT_HAT https://www.techstudio.design/getting-started-with-techstudio-sim7080-development-board/ http://www.spotpear.com/index/study/detail/id/241.html vshymanskyy/TinyGSM#592 https://github.com/tmcadam/sim7000-tools

Hardware:
sim7080g module: https://amzn.to/3Lz5Kg9
IOT sim card: https://amzn.to/3GRQOWZ
5v battery pack: https://amzn.to/3oTOAjL
rpi zero W: https://amzn.to/3oSA6jV

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RPI SETUP:

• add gpio_init.sh (in ref folder) to RPI /bin
• add command /bin/gpio_init.sh & to RPI /etc/rc.local
• this will set power pin low and turn off SIM7080G hat

ON FIRST BOOT:

• SIM7080G module is auto baud so send AT commands at 115200 baud until it responds
• set baud rate for sim7080g: AT+IPR=115200

FOR HTTPS request:

• ssl cert can be loaded into flash on sim7080G module (to verify ssl server) or you can run unverified
• see /libs/tools/certs/READ_ME_certs.txt for information on how to load cert into module

How to run:

• download this repository onto rpi that is connected to sim7080g module
  • wget https://github.com/wottreng/SIM7080G-NB-IoT-Cat-M-LTE-GPS/archive/refs/heads/main.zip
• edit /libs/config_template.py and save as config.py in lib directory
  • mv ./libs/config_template.py ./libs/config.py && nano ./libs/config.py
• create python virtual environment
  • python3 -m venv venv
• install required packages into virtual environment
  • ./venv/bin/pip3 install -r requirements.txt
• run main script
  • ./venv/bin/python3 main.py

NOTES

• GPS/GNSS and cellular can not be used together. Causes module to hang and be unresponsive
  • make sure to turn off network activity then use GPS/GNSS then turn network back on and use Data functions
• Module can be very finiky so lots of error handling is necessary

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Connections:

usbToUART	SIM7080G
VCC	5v
GND	GND
TX	TX
RX	RX

or

rpi Zero W	SIM7080G
GPIO 4	P7 {PWR}
Tx	RX {UART}
Rx	TX {UART}
GND	GND
5v	5v

Notes:
SIM7080G uart jumper on VCC to 3V3 {rpi zero UART is 3.3v only}
SIM7080G jumper on PWR to P7

Cheers, Mark