flow control

[fgnievinski]

it seems the hardware flow control lines (RTS/CTS) are not connected between sim7000 and esp32.

trying instead software flow control (AT+IFC=1,1), it seems the modem never sends XOFF, only XON.

did anyone face a similar issue?

[lewisxhe]

SIM7000G does not have flow control function

[fgnievinski]

sorry, I mean software flow control, which seems supported, no?

[lewisxhe]

OK, I haven't used this function, I need to ask simcom

[lewisxhe]

You need to update the latest firmware, then use the log capture tool to capture the modem log, and then send it to simcom for analysis

Log capture is the same as SIM7080G, but you need to see how to connect USB here
How upgrade fw
Firmware 1529b10SIM7000G
Video

[fgnievinski]

thank you for the video!

I've found the log capture tool (SIMCOM DiagGrabPro) here:
https://momoiot.co.kr/lte-at/module/diagnostic/

thanks also for the newer modem firmware, I'm still using 1529B08.

[fgnievinski]

finally I provide the logs requested:
https://drive.google.com/file/d/1LbQI4KDi_sYv1D_vVJf-JVdASaQ6TrR3/view?usp=drivesdk

could you please send it to Simcom for analysis? thank you, @lewisxhe !

[lewisxhe]

You also need to provide the PN number on the modem label and the current software version you are using. Use AT+SIMCOMATI to query