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don't wait for confirmation response if the write is a broadcast message #118

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don't wait for confirmation response if the write is a broadcast message #118

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4 changes: 2 additions & 2 deletions src/libmodbus/modbus.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1393,7 +1393,7 @@ int modbus_write_bits(modbus_t *ctx, int addr, int nb, const uint8_t *src)
}

rc = send_msg(ctx, req, req_length);
if (rc > 0) {
if (rc > 0 && ctx->slave != 0) {
uint8_t rsp[MAX_MESSAGE_LENGTH];

rc = _modbus_receive_msg(ctx, rsp, MSG_CONFIRMATION);
Expand Down Expand Up @@ -1443,7 +1443,7 @@ int modbus_write_registers(modbus_t *ctx, int addr, int nb, const uint16_t *src)
}

rc = send_msg(ctx, req, req_length);
if (rc > 0) {
if (rc > 0 && ctx->slave != 0) {
uint8_t rsp[MAX_MESSAGE_LENGTH];

rc = _modbus_receive_msg(ctx, rsp, MSG_CONFIRMATION);
Expand Down