zx-uart-ay

Simple dot command for communicating with serial devices attached to AY-8912 (128/+2/+3/Clones) IO port at 9600 baud. Originally created for managing ESP-12 based WiFi module for Sizif-512.

This utility assumes ESP-12 is already configured with AT+UART_DEF=9600,8,1,0,2. It is also capable of reconfiguring factory reset ESP-12, see -f.

Usage: .uart [-b] [-e] [-f] [-n] [-p] [-r] [-s] [text to send]

-b – use AY I/O Port 2 (IOBx), for clones with AY-8910

-e – turns on local echo

-f – initialise ESP-12 after factory reset (sets ESP12 UART speed to 9600,8,1,n,CTS)

-n – no AY IO port initialisation (not really useful, mostly for debugging)

-p – preserve case (by default input converted to uppercase)

-r – check RTS status before sending (nothing will be transmitted if receiver does not manage RTS line!)

-s – “script” mode, sends whatver is supplied on the command line and exit

Also, build-in help does not mention speed selection:

-1, -2, -4, -9 – selects 1200, 2400, 4800 or 9600

Optional text to send will be transmitted as soon as IO ports are initialised, by default .uart sends +++.