IR ESP UART - Reliable IR library for ESP-OPEN-RTOS

This library provides an implementation of the hack described by AnalysIR to reliably send IR codes using the secondary UART in an ESP8266 module.

IR codes are sent on GPIO2, which is also shared by the built-in LED.

Usage

While most IR libraries provide only mark and space methods, to use this library you must wrap your mark / space combination within begin, end calls.

Typical usage would be:

// Common initialization (can be done only once)
ir_esp_uart_init();
ir_esp_set_frequency(38);

// Command begin
ir_esp_uart_begin();

// Command
ir_esp_uart_mark(9000);
ir_esp_uart_space(500);
ir_esp_uart_mark(9000);
ir_esp_uart_space(500);

// Command end
ir_esp_uart_end();

If you are migrating from another IR library it's typically easy to wrap the mark / space calls in a method to add the required begin / end calls.

ir_esp_uart_begin initializes GPIO2 for UART usage, and initializes a timestamp required for better timings in mark / space calls.

ir_esp_uart_end ends a command and returns GPIO2 to GPIO.