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Fixes modbus timing error (#7674)
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parent
2ec17eed58
commit
e85cbf26f8
1 changed files with 24 additions and 12 deletions
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@ -15,23 +15,33 @@ void Modbus::setup() {
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void Modbus::loop() {
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const uint32_t now = millis();
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if (now - this->last_modbus_byte_ > 50) {
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this->rx_buffer_.clear();
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this->last_modbus_byte_ = now;
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}
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// stop blocking new send commands after send_wait_time_ ms regardless if a response has been received since then
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if (now - this->last_send_ > send_wait_time_) {
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waiting_for_response = 0;
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}
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while (this->available()) {
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uint8_t byte;
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this->read_byte(&byte);
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if (this->parse_modbus_byte_(byte)) {
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this->last_modbus_byte_ = now;
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} else {
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size_t at = this->rx_buffer_.size();
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if (at > 0) {
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ESP_LOGV(TAG, "Clearing buffer of %d bytes - parse failed", at);
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this->rx_buffer_.clear();
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}
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}
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}
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if (now - this->last_modbus_byte_ > 50) {
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size_t at = this->rx_buffer_.size();
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if (at > 0) {
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ESP_LOGV(TAG, "Clearing buffer of %d bytes - timeout", at);
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this->rx_buffer_.clear();
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}
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// stop blocking new send commands after sent_wait_time_ ms after response received
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if (now - this->last_send_ > send_wait_time_) {
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if (waiting_for_response > 0)
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ESP_LOGV(TAG, "Stop waiting for response from %d", waiting_for_response);
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waiting_for_response = 0;
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}
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}
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}
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@ -39,7 +49,7 @@ bool Modbus::parse_modbus_byte_(uint8_t byte) {
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size_t at = this->rx_buffer_.size();
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this->rx_buffer_.push_back(byte);
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const uint8_t *raw = &this->rx_buffer_[0];
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ESP_LOGV(TAG, "Modbus received Byte %d (0X%x)", byte, byte);
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ESP_LOGVV(TAG, "Modbus received Byte %d (0X%x)", byte, byte);
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// Byte 0: modbus address (match all)
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if (at == 0)
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return true;
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@ -144,8 +154,10 @@ bool Modbus::parse_modbus_byte_(uint8_t byte) {
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ESP_LOGW(TAG, "Got Modbus frame from unknown address 0x%02X! ", address);
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}
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// return false to reset buffer
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return false;
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// reset buffer
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ESP_LOGV(TAG, "Clearing buffer of %d bytes - parse succeeded", at);
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this->rx_buffer_.clear();
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return true;
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}
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void Modbus::dump_config() {
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