![]() ![]() ![]() This might confuse things, for two reasons: But if you are using an old PC, you might need to use puTTY. If you are using SSH with Win10, you do't need to use puTTY. In other words, if Rpi is set to No Parity, 1 stop bit (8N1) any speed, SIM800 should at power up, detect Rpi 9600 N81 "AT" command and responds with something like "OK" (See Ref 6). It seems that SIM800 can do auto baudrate detect. Now I am read the manual to see how SIM800 serial looks like. (3) SIM800 Serial Communication Specification So perhaps we can start looking at the UART setup and any Hello World AT command shall we use. I read that SIM800 can talk with Rpi using serial AT commands. ![]() (2) How can Rpi send AT serial commands to SIM800? Forget for now the newbie scary things I2C, SPI! :) It is吖good idea to start with the simplest thing first, in our case, UART. (1) Introduction and Functional Block Diagramįirst thing first, let us look at the functional block diagram, and make sure we know which "function" we are messing around. How to use RpiZ USB to serial adapter/cable to connect to SIM800A, and ![]()
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