SIM7000-LTE-Shield
SIM7000-LTE-Shield copied to clipboard
botletics
SIM7000E crashing over and over
Hi there, i bought a module SIM7000E and it seems to be crashing all the time, it looks like it is executing over and over "AT+CFUN=1", and its doing this because the "AT+CEDUMP=0", i checked if it was actually crashing by changing to AT+CEDUMP=1 and stays frozen. I only wanna know why is crashing, or whats the problem, cause i have no clue. The strangest command that i had execute was AT+CFUN=6,0; but the rest were just regular configure commands. Oh, and if anyone knows how to make a factory reset i would be grateful, because i saw that ATZ was deleted on the v1.02
Sorry for my english, and thanks in advance!
What hardware are you using? Does it have a sufficient power supply? Try "AT&F0" to factory reset.
I have tried several ways. I tried connecting just the module (SIM7000E) via USB to the PC, i tried connecting the module to a Raspberry Pi 3 B+ powering it via USB to the PC and to a regular plug and accessing it through putty using the IP and with the OS Raspbian. I also tried the command AT&F0 and it looks like its doing nothing, i see the next info when i used it:
Autobaud support: (9600,19200,38400,57600,115200).
OK
But nothing seems to change. Sorry if it's poor info but i really don't know what to do.
Sorry, my bad, i'm usin a SIM7000E NB-IoT HAT compatible with Raspberry Pi 2B/3B/Zero/Zero W
You might try upgrading the firmware per the instructions on GitHub: https://github.com/botletics/SIM7000-LTE-Shield/wiki/Updating-Firmware if it's not too braindead. There are a lot of issues with the earlier f/w versions. There's also no way that I know of that you can completely zap it back to factory default- some f/w versions support AT&F0 (I think that's the right command) and some don't, but I've never seen it work correctly even when "supported". If someone can convince me otherwise, please do. (I'm working with the "A"mericas version.)
I already have update the firmware, and now im working with qmicli in linux. The modem is able, theoretically, to work with GSM (2G) and Cat-M and NB-IoT (4G). With GSM im having no trouble, with Cat-M im not sur if the SIM Card is capable of work with it, but with NB-IoT i know for sure that it can. When i set the modem to NB-IoT mode, it works for a few seconds, i can even send a Ping Request and it works just fine, but a few seconds later it just crash for no apparent reason. If anyone could help me i would be really grateful
Here in the States as far as I can tell the SIM doesn't care about the service, just the provider and the modem and what you've subscribed to- but let's ignore that for now since you have NB-IoT working. Are you using a battery in conjunction with the UNO USB power? According to the SIMCOM documentation, the 7000 will draw significant current spikes that the USB may not be able to supply- if you don't have a battery, the shield needs a capacitor to buffer the load which the Bioletics shield doesn't appear to have (mine does, it's not a real Bioletics).
Im supplying the Raspberry with 5 V and the HAT also with an external power supply (not using UNO) It has no sense that the cause is a power issue, because GSM demands more amps than the LTE mode.
Look at http://www.shenzhen2u.com/doc/Module/SIM7000C/SIM7000%20Hardware%20Design_V1.01.pdf : Per Table 6, GSM drain spikes 2A but LTE is still 600mA. I know you said GSM works, but... Regardless, I've had a lot of trouble with the SIM7000 module, and so have other people. Maybe we're getting counterfeit modules?
I'm testing the 7020G right now, I haven't finished, but it's a lot better so far.