kc868-A8S v2 not working with SIM7600E

[t0urista]

HI

SIM7600E module plugged in kc868-A8S v2.0 , running KCS 2.2.2. 

• cannot send message, 
  
• cannot receive message (crash/reboot when message is received) 
  
• cannot receive call
  
• can only place test phone call
  

also : 

• the SIM7600E module was successfuly tested with an usb-to-Serial converter and putty. --> the SIM7600 module works fine, can send/receive messages
  
• I also tried Tasmota on the kc868, impossible to establish connection to the SIM7600 in serial bridge --> Issue with RX/TX GPIO13/GPIO15 ?
   
  

Board Model
KC868_A8S
Software Version
v2.2.2
Build Date
Dec 6 2023 22:18:36
Serial Number
08F9E08BCAD4
Board Time
2024-8-27 11:58:45
Time Zone
UTC+2
Lan IP
Lan Netmask
Lan Gateway
Lan MAC
08:F9:E0:8B:CA7
Wifi STA IP
192.168.0.21
Wifi MAC
08:F9:E0:8B:CA4

Tests :

Outgoing 
when issuing test;  I got this :

MAKE A CALL ;  OK, my Mobile phone is properly called.

log :   

Code:

I (121694) SIM7600: call +32xxxxxxxxx

SEND A MESSAGE,  ERROR (no message received on mobile phone)

Log :

Code:

I (689066) SIM7600: [1/1] 0011000B912374940999F500007A2654747A0E4ACF416110BD3CA783DAE5F93C7C2E83CCF2771BB41CE26CB84810377501

 

INCOMING

CALL : nothoing happens, no log