Timeline for SIM800L V2 not responding to AT Commands from Putty over USB-To-TTL PL2303
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Sep 17, 2021 at 16:47 | comment | added | sMooDi | thanks for the datasheet, i had a look at it, but couldn't find anything of use since it's the datasheet of the chip not the module. | |
| Sep 17, 2021 at 15:38 | comment | added | ESD | as jack said the ground is probably ok, It was just things from the top of my head I would check in your position. Here is the datasheet : img.filipeflop.com/files/download/Datasheet_SIM800L.pdf | |
| Sep 17, 2021 at 15:29 | comment | added | sMooDi | @JackCreasey thx for the clarification, at first i didn't connect the gnd pins but then i read on a forum that they both need to have a common ground in order to be able to communicate properly. | |
| Sep 17, 2021 at 15:27 | comment | added | sMooDi | ....finally for the logic analyzer, i don't own one and don't know of any way i can get my hands on one atm, is there any other way i can test this? | |
| Sep 17, 2021 at 15:26 | comment | added | sMooDi | @AntoineLev thanks for the response, first, i couldn't find the datasheet for this model but based on bits of info i gathered from the internet, yes this sim800l meets the serial port requirements and already has a built-in regulator circuit and TTL level converter on board so it would work fine on 5v (btw the ac/dc adapter is 5v 5a), second for the auto baudrate, again no datasheet however the command i'm using to test it is the "AT" command, third for the ground loops thanks for warning me i didn't know that, but i tried connecting them both to the adapter ground but that didn't help..... | |
| Sep 17, 2021 at 15:18 | comment | added | Jack Creasey | The Gnd points are connected together on the board, this is not a problem. This is very typical for USB connected peripherals with power pack supplies. | |
| Sep 17, 2021 at 15:10 | history | answered | ESD | CC BY-SA 4.0 |