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Fix for issue: https://github.com/arendst/Tasmota/issues/18088 (#18228)

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Co-authored-by: JeroenSt <nospam@nospam.org>
This commit is contained in:
Jeroen 2023-03-20 21:26:38 +01:00 committed by GitHub
parent 59677d7e4a
commit fbbb4eaf84
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 80 additions and 82 deletions
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2
lib/lib_basic/TasmotaModbus-3.6.0/src/TasmotaModbus.cpp
View File

@ -204,7 +204,7 @@ uint8_t TasmotaModbus::ReceiveBuffer(uint8_t *buffer, uint8_t register_count, ui
} }
} }
timeout = millis() + 10; timeout = millis() + 20;
} }
} }

160
tasmota/tasmota_xdrv_driver/xdrv_63_modbus_bridge.ino
View File

@ -50,6 +50,7 @@
#define MBR_MAX_VALUE_LENGTH 30 #define MBR_MAX_VALUE_LENGTH 30
#define MBR_BAUDRATE TM_MODBUS_BAUDRATE #define MBR_BAUDRATE TM_MODBUS_BAUDRATE
#define MBR_MAX_REGISTERS 64 #define MBR_MAX_REGISTERS 64
#define MBR_RECEIVE_BUFFER_SIZE (MBR_MAX_REGISTERS * 2) + 9 // Addres(1), Function(1), Length(1) or StartAddress(2), N/A or Number of addresses(2),Data(1..n), CRC(2)
#define D_CMND_MODBUS_SEND "Send" #define D_CMND_MODBUS_SEND "Send"
#define D_CMND_MODBUS_SETBAUDRATE "Baudrate" #define D_CMND_MODBUS_SETBAUDRATE "Baudrate"
@ -166,6 +167,7 @@ struct ModbusBridge
uint8_t deviceAddress = 0; uint8_t deviceAddress = 0;
uint8_t count = 0; uint8_t count = 0;
bool raw = false; bool raw = false;
uint8_t *buffer = nullptr;
}; };
ModbusBridge modbusBridge; ModbusBridge modbusBridge;
@ -204,6 +206,8 @@ bool ModbusBridgeBegin(void)
} }
AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBR %s ser init at %d baud"), (2 == result ? "HW" : "SW"), Settings->modbus_sbaudrate * 300); AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBR %s ser init at %d baud"), (2 == result ? "HW" : "SW"), Settings->modbus_sbaudrate * 300);
} }
modbusBridge.buffer = (uint8_t *)malloc(MBR_RECEIVE_BUFFER_SIZE);
return result; return result;
} }
@ -241,16 +245,16 @@ void ModbusBridgeHandle(void)
bool data_ready = modbusBridgeModbus->ReceiveReady(); bool data_ready = modbusBridgeModbus->ReceiveReady();
if (data_ready) if (data_ready)
{ {
uint8_t *buffer;
if (modbusBridge.byteCount == 0) modbusBridge.byteCount = modbusBridge.dataCount * 2; if (modbusBridge.byteCount == 0) modbusBridge.byteCount = modbusBridge.dataCount * 2;
buffer = (uint8_t *)malloc(9 + modbusBridge.byteCount); // Addres(1), Function(1), Length(1), Data(1..n), CRC(2) if (nullptr == modbusBridge.buffer)
if (nullptr == buffer)
{ {
ModbusBridgeAllocError(PSTR("read")); ModbusBridgeAllocError(PSTR("read"));
modbusBridge.dataCount = 0;
modbusBridge.byteCount = 0;
return; return;
} }
memset(buffer, 0, 9 + modbusBridge.byteCount); memset(modbusBridge.buffer, 0, MBR_RECEIVE_BUFFER_SIZE);
uint32_t error = modbusBridgeModbus->ReceiveBuffer(buffer, 0, modbusBridge.byteCount); uint32_t error = modbusBridgeModbus->ReceiveBuffer(modbusBridge.buffer, 0, modbusBridge.byteCount);
#ifdef USE_MODBUS_BRIDGE_TCP #ifdef USE_MODBUS_BRIDGE_TCP
for (uint32_t i = 0; i < nitems(modbusBridgeTCP.client_tcp); i++) for (uint32_t i = 0; i < nitems(modbusBridgeTCP.client_tcp); i++)
@ -264,35 +268,35 @@ void ModbusBridgeHandle(void)
header[1] = modbusBridgeTCP.tcp_transaction_id; header[1] = modbusBridgeTCP.tcp_transaction_id;
header[2] = 0; header[2] = 0;
header[3] = 0; header[3] = 0;
header[6] = buffer[0]; // Send slave address header[6] = modbusBridge.buffer[0]; // Send slave address
header[7] = buffer[1]; // Send function code header[7] = modbusBridge.buffer[1]; // Send function code
if (error) if (error)
{ {
header[4] = 0; // Message Length Hi-Byte header[4] = 0; // Message Length Hi-Byte
header[5] = 3; // Message Length Low-Byte header[5] = 3; // Message Length Low-Byte
header[7] = buffer[1] | 0x80; // Send function code header[7] = modbusBridge.buffer[1] | 0x80; // Send function code
header[8] = error; header[8] = error;
nrOfBytes += 1; nrOfBytes += 1;
client.write(header, 9); client.write(header, 9);
} }
else if (buffer[1] <= 2) else if (modbusBridge.buffer[1] <= 2)
{ {
header[4] = modbusBridge.byteCount >> 8; header[4] = modbusBridge.byteCount >> 8;
header[5] = modbusBridge.byteCount + 3; header[5] = modbusBridge.byteCount + 3;
header[8] = modbusBridge.byteCount; header[8] = modbusBridge.byteCount;
client.write(header, 9); client.write(header, 9);
nrOfBytes += 1; nrOfBytes += 1;
client.write(buffer + 3, modbusBridge.byteCount); // Don't send CRC client.write(modbusBridge.buffer + 3, modbusBridge.byteCount); // Don't send CRC
nrOfBytes += modbusBridge.byteCount; nrOfBytes += modbusBridge.byteCount;
} }
else if (buffer[1] <= 4) else if (modbusBridge.buffer[1] <= 4)
{ {
header[4] = modbusBridge.byteCount >> 8; header[4] = modbusBridge.byteCount >> 8;
header[5] = modbusBridge.byteCount + 3; header[5] = modbusBridge.byteCount + 3;
header[8] = modbusBridge.byteCount; header[8] = modbusBridge.byteCount;
client.write(header, 9); client.write(header, 9);
nrOfBytes += 1; nrOfBytes += 1;
client.write(buffer + 3, modbusBridge.byteCount); // Don't send CRC client.write(modbusBridge.buffer + 3, modbusBridge.byteCount); // Don't send CRC
nrOfBytes += modbusBridge.byteCount; nrOfBytes += modbusBridge.byteCount;
} }
else else
@ -300,23 +304,24 @@ void ModbusBridgeHandle(void)
header[4] = 0; // Message Length Hi-Byte header[4] = 0; // Message Length Hi-Byte
header[5] = 6; // Message Length Low-Byte header[5] = 6; // Message Length Low-Byte
client.write(header, 8); client.write(header, 8);
client.write(buffer + 2, 4); // Don't send CRC client.write(modbusBridge.buffer + 2, 4); // Don't send CRC
nrOfBytes += 4; nrOfBytes += 4;
} }
client.flush(); client.flush();
AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBRTCP from Modbus deviceAddress %d, writing %d bytes to client"), buffer[0], nrOfBytes); AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBRTCP from Modbus deviceAddress %d, writing %d bytes to client"), modbusBridge.buffer[0], nrOfBytes);
} }
} }
#endif #endif
modbusBridge.byteCount = 0;
if (error) if (error)
{ {
AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBR Driver receive error %d"), error); AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBR Driver receive error %d"), error);
free(buffer); modbusBridge.dataCount = 0;
return; return;
} }
modbusBridge.byteCount = 0;
ModbusBridgeError errorcode = ModbusBridgeError::noerror; ModbusBridgeError errorcode = ModbusBridgeError::noerror;
if (modbusBridge.deviceAddress == 0) if (modbusBridge.deviceAddress == 0)
@ -325,32 +330,31 @@ void ModbusBridgeHandle(void)
// If tcp client connected don't log error and exit this function (do not process) // If tcp client connected don't log error and exit this function (do not process)
if (nitems(modbusBridgeTCP.client_tcp)) if (nitems(modbusBridgeTCP.client_tcp))
{ {
free(buffer);
return; return;
} }
#endif #endif
errorcode = ModbusBridgeError::nodataexpected; errorcode = ModbusBridgeError::nodataexpected;
} }
else if (modbusBridge.deviceAddress != (uint8_t)buffer[0]) else if (modbusBridge.deviceAddress != (uint8_t)modbusBridge.buffer[0])
errorcode = ModbusBridgeError::wrongdeviceaddress; errorcode = ModbusBridgeError::wrongdeviceaddress;
else if ((uint8_t)modbusBridge.functionCode != (uint8_t)buffer[1]) else if ((uint8_t)modbusBridge.functionCode != (uint8_t)modbusBridge.buffer[1])
errorcode = ModbusBridgeError::wrongfunctioncode; errorcode = ModbusBridgeError::wrongfunctioncode;
else if ((uint8_t)modbusBridge.functionCode < 5) else if ((uint8_t)modbusBridge.functionCode < 5)
{ {
if ((uint8_t)modbusBridge.functionCode < 3) if ((uint8_t)modbusBridge.functionCode < 3)
{ {
if ((uint8_t)(((modbusBridge.dataCount - 1) >> 3) + 1) != (uint8_t)buffer[2]) if ((uint8_t)(((modbusBridge.dataCount - 1) >> 3) + 1) != (uint8_t)modbusBridge.buffer[2])
errorcode = ModbusBridgeError::wrongdataCount; errorcode = ModbusBridgeError::wrongdataCount;
} }
else else
{ {
if ((modbusBridge.type == ModbusBridgeType::mb_int8 || modbusBridge.type == ModbusBridgeType::mb_uint8) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)buffer[2])) if ((modbusBridge.type == ModbusBridgeType::mb_int8 || modbusBridge.type == ModbusBridgeType::mb_uint8) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
errorcode = ModbusBridgeError::wrongdataCount; errorcode = ModbusBridgeError::wrongdataCount;
else if ((modbusBridge.type == ModbusBridgeType::mb_bit) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)buffer[2])) else if ((modbusBridge.type == ModbusBridgeType::mb_bit) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
errorcode = ModbusBridgeError::wrongdataCount; errorcode = ModbusBridgeError::wrongdataCount;
else if ((modbusBridge.type == ModbusBridgeType::mb_int16 || modbusBridge.type == ModbusBridgeType::mb_uint16) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)buffer[2])) else if ((modbusBridge.type == ModbusBridgeType::mb_int16 || modbusBridge.type == ModbusBridgeType::mb_uint16) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
errorcode = ModbusBridgeError::wrongdataCount; errorcode = ModbusBridgeError::wrongdataCount;
else if ((modbusBridge.type == ModbusBridgeType::mb_int32 || modbusBridge.type == ModbusBridgeType::mb_uint32 || modbusBridge.type == ModbusBridgeType::mb_float) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)buffer[2])) else if ((modbusBridge.type == ModbusBridgeType::mb_int32 || modbusBridge.type == ModbusBridgeType::mb_uint32 || modbusBridge.type == ModbusBridgeType::mb_float) && ((uint8_t)modbusBridge.dataCount * 2 != (uint8_t)modbusBridge.buffer[2]))
errorcode = ModbusBridgeError::wrongdataCount; errorcode = ModbusBridgeError::wrongdataCount;
} }
} }
@ -361,7 +365,7 @@ void ModbusBridgeHandle(void)
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{\"RAW\":[")); Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{\"RAW\":["));
for (uint8_t i = 0; i < modbusBridgeModbus->ReceiveCount(); i++) for (uint8_t i = 0; i < modbusBridgeModbus->ReceiveCount(); i++)
{ {
ResponseAppend_P(PSTR("%d"), buffer[i]); ResponseAppend_P(PSTR("%d"), modbusBridge.buffer[i]);
if (i < modbusBridgeModbus->ReceiveCount() - 1) if (i < modbusBridgeModbus->ReceiveCount() - 1)
ResponseAppend_P(PSTR(",")); ResponseAppend_P(PSTR(","));
} }
@ -374,7 +378,7 @@ void ModbusBridgeHandle(void)
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{\"HEX\":[")); Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{\"HEX\":["));
for (uint8_t i = 0; i < modbusBridgeModbus->ReceiveCount(); i++) for (uint8_t i = 0; i < modbusBridgeModbus->ReceiveCount(); i++)
{ {
ResponseAppend_P(PSTR("0x%02X"), buffer[i]); ResponseAppend_P(PSTR("0x%02X"), modbusBridge.buffer[i]);
if (i < modbusBridgeModbus->ReceiveCount() - 1) if (i < modbusBridgeModbus->ReceiveCount() - 1)
ResponseAppend_P(PSTR(",")); ResponseAppend_P(PSTR(","));
} }
@ -382,19 +386,19 @@ void ModbusBridgeHandle(void)
ResponseJsonEnd(); ResponseJsonEnd();
MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_TELE, PSTR(D_JSON_MODBUS_RECEIVED)); MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_TELE, PSTR(D_JSON_MODBUS_RECEIVED));
} }
else if ((buffer[1] > 0) && (buffer[1] < 7)) // Read Registers else if ((modbusBridge.buffer[1] > 0) && (modbusBridge.buffer[1] < 7)) // Read Registers
{ {
uint8_t dataOffset = 3; uint8_t dataOffset = 3;
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{")); Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{"));
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_DEVICE_ADDRESS "\":%d,"), buffer[0]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_DEVICE_ADDRESS "\":%d,"), modbusBridge.buffer[0]);
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_FUNCTION_CODE "\":%d,"), buffer[1]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_FUNCTION_CODE "\":%d,"), modbusBridge.buffer[1]);
if (buffer[1] < 5) if (modbusBridge.buffer[1] < 5)
{ {
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_START_ADDRESS "\":%d,"), modbusBridge.startAddress); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_START_ADDRESS "\":%d,"), modbusBridge.startAddress);
} }
else else
{ {
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_START_ADDRESS "\":%d,"), (buffer[2] << 8) + buffer[3]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_START_ADDRESS "\":%d,"), (modbusBridge.buffer[2] << 8) + modbusBridge.buffer[3]);
dataOffset = 4; dataOffset = 4;
} }
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_LENGTH "\":%d,"), modbusBridgeModbus->ReceiveCount()); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_LENGTH "\":%d,"), modbusBridgeModbus->ReceiveCount());
@ -418,24 +422,24 @@ void ModbusBridgeHandle(void)
{ {
// Convert next 4 bytes to float // Convert next 4 bytes to float
float value = 0; float value = 0;
if (buffer[1] < 3) if (modbusBridge.buffer[1] < 3)
{ {
// In bit mode only convert returned bytes // In bit mode only convert returned bytes
if (buffer[2] - (count * 4)) if (modbusBridge.buffer[2] - (count * 4))
((uint8_t *)&value)[0] = buffer[dataOffset + (count * 4)]; // Get float values ((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + (count * 4)]; // Get float values
if ((buffer[2] - (count * 4)) >> 1) if ((modbusBridge.buffer[2] - (count * 4)) >> 1)
((uint8_t *)&value)[1] = buffer[dataOffset + 1 + (count * 4)]; ((uint8_t *)&value)[1] = modbusBridge.buffer[dataOffset + 1 + (count * 4)];
if ((buffer[2] - (count * 4) - 1) >> 1) if ((modbusBridge.buffer[2] - (count * 4) - 1) >> 1)
((uint8_t *)&value)[2] = buffer[dataOffset + 2 + (count * 4)]; ((uint8_t *)&value)[2] = modbusBridge.buffer[dataOffset + 2 + (count * 4)];
if ((buffer[2] - (count * 4)) >> 2) if ((modbusBridge.buffer[2] - (count * 4)) >> 2)
((uint8_t *)&value)[3] = buffer[dataOffset + 3 + (count * 4)]; ((uint8_t *)&value)[3] = modbusBridge.buffer[dataOffset + 3 + (count * 4)];
} }
else else
{ {
((uint8_t *)&value)[3] = buffer[dataOffset + (count * 4)]; // Get float values ((uint8_t *)&value)[3] = modbusBridge.buffer[dataOffset + (count * 4)]; // Get float values
((uint8_t *)&value)[2] = buffer[dataOffset + 1 + (count * 4)]; ((uint8_t *)&value)[2] = modbusBridge.buffer[dataOffset + 1 + (count * 4)];
((uint8_t *)&value)[1] = buffer[dataOffset + 2 + (count * 4)]; ((uint8_t *)&value)[1] = modbusBridge.buffer[dataOffset + 2 + (count * 4)];
((uint8_t *)&value)[0] = buffer[dataOffset + 3 + (count * 4)]; ((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + 3 + (count * 4)];
} }
ext_snprintf_P(svalue, sizeof(svalue), "%*_f", 10, &value); ext_snprintf_P(svalue, sizeof(svalue), "%*_f", 10, &value);
} }
@ -446,11 +450,11 @@ void ModbusBridgeHandle(void)
if (bits_left < 8) if (bits_left < 8)
{ {
uint8_t bits_skip = 8 - bits_left; uint8_t bits_skip = 8 - bits_left;
value = (uint8_t)(buffer[dataOffset + ((count + bits_skip) >> 3)]); value = (uint8_t)(modbusBridge.buffer[dataOffset + ((count + bits_skip) >> 3)]);
} }
else else
{ {
value = (uint8_t)(buffer[dataOffset + (count >> 3)]); value = (uint8_t)(modbusBridge.buffer[dataOffset + (count >> 3)]);
} }
snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", ((value >> (count & 7)) & 1)); snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", ((value >> (count & 7)) & 1));
} }
@ -460,23 +464,23 @@ void ModbusBridgeHandle(void)
(modbusBridge.type == ModbusBridgeType::mb_uint32)) (modbusBridge.type == ModbusBridgeType::mb_uint32))
{ {
uint32_t value = 0; uint32_t value = 0;
if (buffer[1] < 3) if (modbusBridge.buffer[1] < 3)
{ {
if (buffer[2] - (count * 4)) if (modbusBridge.buffer[2] - (count * 4))
((uint8_t *)&value)[0] = buffer[dataOffset + (count * 4)]; // Get uint values ((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + (count * 4)]; // Get uint values
if (buffer[2] - ((count * 4) - 1)) if (modbusBridge.buffer[2] - ((count * 4) - 1))
((uint8_t *)&value)[1] = buffer[dataOffset + 1 + (count * 4)]; ((uint8_t *)&value)[1] = modbusBridge.buffer[dataOffset + 1 + (count * 4)];
if (buffer[2] - ((count * 4) - 2)) if (modbusBridge.buffer[2] - ((count * 4) - 2))
((uint8_t *)&value)[2] = buffer[dataOffset + 2 + (count * 4)]; ((uint8_t *)&value)[2] = modbusBridge.buffer[dataOffset + 2 + (count * 4)];
if (buffer[2] - ((count * 4) - 3)) if (modbusBridge.buffer[2] - ((count * 4) - 3))
((uint8_t *)&value)[3] = buffer[dataOffset + 3 + (count * 4)]; ((uint8_t *)&value)[3] = modbusBridge.buffer[dataOffset + 3 + (count * 4)];
} }
else else
{ {
((uint8_t *)&value)[3] = buffer[dataOffset + (count * 4)]; // Get uint values ((uint8_t *)&value)[3] = modbusBridge.buffer[dataOffset + (count * 4)]; // Get uint values
((uint8_t *)&value)[2] = buffer[dataOffset + 1 + (count * 4)]; ((uint8_t *)&value)[2] = modbusBridge.buffer[dataOffset + 1 + (count * 4)];
((uint8_t *)&value)[1] = buffer[dataOffset + 2 + (count * 4)]; ((uint8_t *)&value)[1] = modbusBridge.buffer[dataOffset + 2 + (count * 4)];
((uint8_t *)&value)[0] = buffer[dataOffset + 3 + (count * 4)]; ((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + 3 + (count * 4)];
} }
if (modbusBridge.type == ModbusBridgeType::mb_int32) if (modbusBridge.type == ModbusBridgeType::mb_int32)
snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", value); snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", value);
@ -487,17 +491,17 @@ void ModbusBridgeHandle(void)
(modbusBridge.type == ModbusBridgeType::mb_uint16)) (modbusBridge.type == ModbusBridgeType::mb_uint16))
{ {
uint16_t value = 0; uint16_t value = 0;
if (buffer[1] < 3) if (modbusBridge.buffer[1] < 3)
{ {
if (buffer[2] - (count * 2)) if (modbusBridge.buffer[2] - (count * 2))
((uint8_t *)&value)[0] = buffer[dataOffset + (count * 2)]; ((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + (count * 2)];
if (buffer[2] - ((count * 2) - 1)) if (modbusBridge.buffer[2] - ((count * 2) - 1))
((uint8_t *)&value)[1] = buffer[dataOffset + 1 + (count * 2)]; ((uint8_t *)&value)[1] = modbusBridge.buffer[dataOffset + 1 + (count * 2)];
} }
else else
{ {
((uint8_t *)&value)[1] = buffer[dataOffset + (count * 2)]; ((uint8_t *)&value)[1] = modbusBridge.buffer[dataOffset + (count * 2)];
((uint8_t *)&value)[0] = buffer[dataOffset + 1 + (count * 2)]; ((uint8_t *)&value)[0] = modbusBridge.buffer[dataOffset + 1 + (count * 2)];
} }
if (modbusBridge.type == ModbusBridgeType::mb_int16) if (modbusBridge.type == ModbusBridgeType::mb_int16)
snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", value); snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", value);
@ -507,7 +511,7 @@ void ModbusBridgeHandle(void)
else if ((modbusBridge.type == ModbusBridgeType::mb_int8) || else if ((modbusBridge.type == ModbusBridgeType::mb_int8) ||
(modbusBridge.type == ModbusBridgeType::mb_uint8)) (modbusBridge.type == ModbusBridgeType::mb_uint8))
{ {
uint8_t value = buffer[dataOffset + (count * 1)]; uint8_t value = modbusBridge.buffer[dataOffset + (count * 1)];
if (modbusBridge.type == ModbusBridgeType::mb_int8) if (modbusBridge.type == ModbusBridgeType::mb_int8)
snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", value); snprintf(svalue, MBR_MAX_VALUE_LENGTH, "%d", value);
else else
@ -525,14 +529,14 @@ void ModbusBridgeHandle(void)
if (errorcode == ModbusBridgeError::noerror) if (errorcode == ModbusBridgeError::noerror)
MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_TELE, PSTR(D_JSON_MODBUS_RECEIVED)); MqttPublishPrefixTopicRulesProcess_P(RESULT_OR_TELE, PSTR(D_JSON_MODBUS_RECEIVED));
} }
else if ((buffer[1] == 15) || (buffer[1] == 16)) // Write Multiple Registers else if ((modbusBridge.buffer[1] == 15) || (modbusBridge.buffer[1] == 16)) // Write Multiple Registers
{ {
Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{")); Response_P(PSTR("{\"" D_JSON_MODBUS_RECEIVED "\":{"));
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_DEVICE_ADDRESS "\":%d,"), buffer[0]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_DEVICE_ADDRESS "\":%d,"), modbusBridge.buffer[0]);
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_FUNCTION_CODE "\":%d,"), buffer[1]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_FUNCTION_CODE "\":%d,"), modbusBridge.buffer[1]);
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_START_ADDRESS "\":%d,"), (buffer[2] << 8) + buffer[3]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_START_ADDRESS "\":%d,"), (modbusBridge.buffer[2] << 8) + modbusBridge.buffer[3]);
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_LENGTH "\":%d,"), modbusBridgeModbus->ReceiveCount()); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_LENGTH "\":%d,"), modbusBridgeModbus->ReceiveCount());
ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_COUNT "\":%d"), (buffer[4] << 8) + buffer[5]); ResponseAppend_P(PSTR("\"" D_JSON_MODBUS_COUNT "\":%d"), (modbusBridge.buffer[4] << 8) + modbusBridge.buffer[5]);
ResponseAppend_P(PSTR("}")); ResponseAppend_P(PSTR("}"));
ResponseJsonEnd(); ResponseJsonEnd();
if (errorcode == ModbusBridgeError::noerror) if (errorcode == ModbusBridgeError::noerror)
@ -546,7 +550,6 @@ void ModbusBridgeHandle(void)
AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBR Recv Error %d"), (uint8_t)errorcode); AddLog(LOG_LEVEL_DEBUG, PSTR("MBS: MBR Recv Error %d"), (uint8_t)errorcode);
} }
modbusBridge.deviceAddress = 0; modbusBridge.deviceAddress = 0;
free(buffer);
} }
} }
@ -733,6 +736,8 @@ void CmndModbusBridgeSend(void)
const char *stype = root.getStr(PSTR(D_JSON_MODBUS_TYPE), "uint8"); const char *stype = root.getStr(PSTR(D_JSON_MODBUS_TYPE), "uint8");
modbusBridge.count = root.getUInt(PSTR(D_JSON_MODBUS_COUNT), 1); // Number of bits or bytes to read / write modbusBridge.count = root.getUInt(PSTR(D_JSON_MODBUS_COUNT), 1); // Number of bits or bytes to read / write
// If functioncode is 1, 2 or 15, the count is not the number of registers but the number
// of bit to read or write, so calculate the number data bytes to read/write.
if ((functionCode == 1) || (functionCode == 2) || (functionCode == 15)) bitMode = true; if ((functionCode == 1) || (functionCode == 2) || (functionCode == 15)) bitMode = true;
if (modbusBridge.deviceAddress == 0) if (modbusBridge.deviceAddress == 0)
@ -749,11 +754,11 @@ void CmndModbusBridgeSend(void)
} }
modbusBridge.type = ModbusBridgeType::mb_undefined; modbusBridge.type = ModbusBridgeType::mb_undefined;
if (bitMode) modbusBridge.byteCount = (modbusBridge.count + 7) / 8;
if (strcmp(stype, "int8") == 0) if (strcmp(stype, "int8") == 0)
{ {
modbusBridge.type = ModbusBridgeType::mb_int8; modbusBridge.type = ModbusBridgeType::mb_int8;
modbusBridge.dataCount = bitMode ? modbusBridge.count : ((modbusBridge.count - 1) / 2) + 1; modbusBridge.dataCount = bitMode ? modbusBridge.count : ((modbusBridge.count - 1) / 2) + 1;
if (bitMode) modbusBridge.byteCount = (modbusBridge.count / 8) + 1;
} }
else if (strcmp(stype, "int16") == 0) else if (strcmp(stype, "int16") == 0)
{ {
@ -803,13 +808,6 @@ void CmndModbusBridgeSend(void)
else else
errorcode = ModbusBridgeError::wrongtype; errorcode = ModbusBridgeError::wrongtype;
// If functioncode is 15, the count is not the number of registers but the number
// of bit to write, so calculate the number data bytes to write.
if (modbusBridge.functionCode == ModbusBridgeFunctionCode::mb_writeMultipleCoils)
{
modbusBridge.dataCount = modbusBridge.count;
}
// Prevent buffer overflow due to usage of to many registers // Prevent buffer overflow due to usage of to many registers
if ((!bitMode) && (modbusBridge.dataCount > MBR_MAX_REGISTERS)) if ((!bitMode) && (modbusBridge.dataCount > MBR_MAX_REGISTERS))
errorcode = ModbusBridgeError::wrongcount; errorcode = ModbusBridgeError::wrongcount;