To be able to communicate with the serial port using Python, you will need pySerial. espruino_command.py "digitalWrite(LED1,1)" espruino_command.py "print(analogRead(A0))" You can just run this from the shell with commands like: $.
#print espruino_cmd("print(analogRead(A1))").strip() Port='/dev/ttyACM0', # or /dev/ttyAMA0 for serial on the Raspberry Pi There's some example Python code here: #!/usr/bin/python When you exit, send the text echo(1) (and a newline) - this will turn echoing back on so that next time you connect with a terminal, Espruino responds to your keypresses in the way you'd expect.Or read back values by sending commands like print(analogRead(A0)), and waiting a fraction of a second for the result to appear.Send javascript commands, like digitalWrite(LED1,1).Send the text echo(0) (and a newline) - this turns off echoing, which means that the only text Espruino sends is that which comes from print(.).In your favourite language, open the serial port at 9600bps.You have to do this with: stty -F /dev/ttyACM0 9600 If you're not connecting by USB, you may have to set up the baud rate first. Note: On Linux, devices will be /dev/ttyACM0, ttyAMA0, etc, but on MacOS you'll want to use the /dev/cu.usmodem1234 device name. This is very similar to windows as long as you know the device name of Espruino. You have to do this with: MODE COM10:9600,N,8,1
If you want to wrap this up in a shortcut to go on the desktop, just enter the following as the shortcut location: cmd.exe /c "echo t() > \\.\COM10" Where COM10 is the COM port of your device. For instance to turn an LED on, the command is: echo t() > \\.\COM10 You can write to Espruino very easily with the Windows Command Prompt. To make this easier we've made the UART.js Library to provide a consistent API for accessing Serial/Bluetooth devices from the web: If you're sending a lot of commands you can either turn off echo permanentlyīy sending the command "echo(0)\n", or you can turn it off just for a lineīy sending character code 16 "\x10" as the first character on the line - eg. Will return extra characters - 'echoing' what was written back to the terminal.
NOTE: Because the devices expect to be outputting to a VT100 terminal, they You were typing the command directly at the REPL. Normally you would connect with a VT100-compatible terminalĪnd you can write code, however you can send commands straight to them as if You can use Espruino directly from your PC, Mac or Raspberry Pi to turn things on and off or measure values.Įspruino devices appear as a serial port, and on that serial port they present a
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