SIM7070G firmware and UDP
tridge 2025-07-02 18:11:51 1311 Views4 Replies I have a DFRobot SimCom SIM7070G modem. It came with firmware 1951B15SIM7070 (from AT+CGMR). I thought I saw there was a new B17 firmware available, and loaded 1951B17SIM7080 till I realised my mistake and it is a 7080 firmware. I then wanted to back down to the original B15 and couldn't find it in downloads. I've downloaded and installed 1951B14SIM7070 OK, but I can't get UDP to work.
Is there somewhere I can download 1951B15SIM7070 from? Or a newer version?
For UDP, ideally I'd like to get a transparent UDP connection going with AT+CAOPEN and AT+CASWITCH, but even a non-transparent UDP connection would be OK. I always get +CAOPEN: n,1 for the CAOPEN reply, which is an error (2nd number should be zero for success). Anyone else having trouble getting UDP going? I don't need GPS so I've set AT+CGNSPWR=0 as I had read that the 7070 can't do UDP and GPS at the same time, but powering off the GNS subsystem doesn't help unfortunately.
Best regards,
Andrew Tridgell
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Cesar.Erickson I now have transparent UDP working with the SIM7070G. I am using firmware 1951B17SIM7080 and the following sequence from power on creates a working transparent UDP connection to IP aaa.bbb.ccc.ddd on UDP port 40001:
AT+CREG?
AT+CREG?
+CREG: 0,1
OK
AT+CACID=0
AT+CACID=0
OK
AT+CNACT=0,1
AT+CNACT=0,1
OK
+APP PDP: 0,ACTIVE
AT+CAOPEN=0,0,"UDP","aaa.bbb.ccc.ddd",40001
AT+CAOPEN=0,0,"UDP","aaa.bbb.ccc.ddd",40001
+CAOPEN: 0,0
OK
AT+CASWITCH=0,1
AT+CASWITCH=0,1
OK
CONNECT
test message
test reply
tridge What is the power supply that you're using to power up SIM7070G?
ahsrab.rifat I've tested with 5v, 12v and 6v. Also tested with USB power.
