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Merge pull request #13641 from s-hadinger/serial_lowbitrate 

Make serial more responsive at low bitrate
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Theo Arends 2021-11-11 20:15:39 +01:00 committed by GitHub
parent 156c41c0a7 a36331fe47
commit 0ef9e0f29c
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1 changed files with 20 additions and 0 deletions
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20
lib/default/TasmotaSerial-3.3.0/src/TasmotaSerial.cpp
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@ -38,6 +38,8 @@ TasmotaSerial *tms_obj_list[16];
#endif // ESP8266
#ifdef ESP32
#include "driver/uart.h"
#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
static int tasmota_serial_index = 2; // Allow UART2 and UART1 only
#elif CONFIG_IDF_TARGET_ESP32S2 // ESP32-S2
@ -155,6 +157,24 @@ bool TasmotaSerial::begin(uint32_t speed, uint32_t config) {
if (serial_buffer_size > 256) {
TSerial->setRxBufferSize(serial_buffer_size);
}
// For low bit rate, below 9600, set the Full RX threshold at 10 bytes instead of the default 120
if (speed <= 9600) {
// At 9600, 10 chars are ~10ms
uart_set_rx_full_threshold(m_uart, 10);
} else if (speed < 115200) {
// At 19200, 120 chars are ~60ms
// At 76800, 120 chars are ~15ms
uart_set_rx_full_threshold(m_uart, 120);
} else {
// At 115200, 256 chars are ~20ms
// Zigbee requires to keep frames together, i.e. 256 bytes max
uart_set_rx_full_threshold(m_uart, 256);
}
// For bitrate below 115200, set the Rx time out to 6 chars instead of the default 10
if (speed < 115200) {
// At 76800 the timeout is ~1ms
uart_set_rx_timeout(m_uart, 6);
}
} else {
m_valid = false;
}