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Use 75% of the buffer for speeds higher than 115200 (#22774) 

Higher speeds need larger buffer. Processing takes longer, so let's put the threshold at
75% of the buffer size to have some headroom. E.g. for 1Mbit with 2.5KB buffer 2048 characters
would be roughly still around 20ms, and reserve additional 512 chars / 5ms to handle the
buffer after the threshold is reached

Co-authored-by: mrkev-gh <mrkev-gh@users.noreply.github.com>
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mrkev-gh 2025-01-06 11:34:06 +01:00 committed by GitHub
parent 17ab5a5e83
commit b472e821cf
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1 changed files with 4 additions and 1 deletions
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lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
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@ -172,10 +172,13 @@ void TasmotaSerial::Esp32Begin(void) {
// At 19200, 120 chars are ~60ms
// At 76800, 120 chars are ~15ms
uart_set_rx_full_threshold(m_uart, 120);
} else {
} else if (m_speed == 115200) {
// 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);
} else {
// At even higher speeds set 75% of the buffer
uart_set_rx_full_threshold(m_uart, serial_buffer_size * 3 / 4);
}
// For bitrate below 115200, set the Rx time out to 6 chars instead of the default 10
if (m_speed < 115200) {