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Add Modbus errorcode

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Theo Arends 2021-01-26 17:34:48 +01:00
parent 7249552582
commit 05650384dd
1 changed files with 11 additions and 8 deletions
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3
lib/lib_basic/TasmotaModbus-1.2.0/src/TasmotaModbus.cpp
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@ -93,6 +93,9 @@ uint8_t TasmotaModbus::ReceiveBuffer(uint8_t *buffer, uint8_t register_count)
buffer[mb_len++] = data; buffer[mb_len++] = data;
if (3 == mb_len) { if (3 == mb_len) {
if (buffer[1] & 0x80) { // 01 84 02 f2 f1 if (buffer[1] & 0x80) { // 01 84 02 f2 f1
if (0 == buffer[2]) {
return 3; // 3 = Illegal Data Value,
}
return buffer[2]; // 1 = Illegal Function, return buffer[2]; // 1 = Illegal Function,
// 2 = Illegal Data Address, // 2 = Illegal Data Address,
// 3 = Illegal Data Value, // 3 = Illegal Data Value,