Re: Sim800l module
I can't seem to find any documentation on the use of this module. Can you please provide an example file showing the supported AT commands. Also I can't find any information on the pinout for this board. From a users perspective it really is unfortunate to buy a product and struggle to figure how to use it. The m5stack, up to this point, was a terrific experience because you guys had samples and drawings and solid documentation. In the future I suggest only releasing modules once they are fully documented.
@jpilarski Hi Jp,
Not sure where you purchased yours but they should have included the photo below outlining the pin-outs used.
Here is a link to a manual for the AT command set for this sim module:
There are many more datasheets at the Simcom website link if you are prepared to register:
Here is a link to a simple program that could form the basis for use with the M5 stack.... You can probably find more examples on github.
It will need some conversion to make it compatible with the M5Stack. For starters you would need to add this to the start:
The GSM format used on this module is not supported in my country so I have no experience using it.
If you can Russian the best manual for SIM800L here
Many sketches for Arduino that can be easily conversion to M5 Stask.
SoftwareSerial SIM800 (8, 9); // 8 - RX Arduino (TX SIM800L), 9 - TX Arduino (RX SIM800L)
HardwareSerial SIM800 (2); // pin 16 = RX, pin 17 = TX
Thanks very much. Is the mic on GPIO5. I was just making a purchase on amazon and thought I'd try out a module. This image wasn't on the re-sellers page. I wasn't even sure what it did and figured it would be a new thing to learn about. Really your documentation has been really great. It makes a huge difference to users. The enjoyable experience of using your product is what made me want to purchase a module. Maybe there should be a page for each module with all the relevant information just in case the re-seller isn't providing it.
Is the mic on GPIO5
No. mic and headphone are connected direct to SIM800L module.
GPIO5 is reset.
M5 Stask <> SIM800L
Vbat - Vcc (3.7-4.3V)
GPIO16(RX) - TXD
GPIO17(TX) - RXD (must be not direct 3.3V > 2.5V)
GPIO5 - RST
GND - GND
RING is not used.
DTR is not used.
MIC+, MIC- to microphone.
SPK+, SPK- to headphone.
Example for Arduino
any update of demonstration source code for the sim module with realtime streaming audio over Gsm ?
Looking for using it as a basic talking only smartphone in full duplex, send and receive at the same time ?
If possible Under Arduino IDE , with ino file ...
Good project and information..
if it can help you :