Fix datatypes

Author: Channel59

src/ModbusClient.cpp

@@ -163,13 +163,13 @@ long ModbusClient::inputRegisterRead(int id, int address)
   return value;
 }
 
-long ModbusClient::slaveIdRead(int id)
+long ModbusClient::slaveIdRead(uint8_t id)
 {
-  uint16_t value;
+  uint8_t value;
 
   modbus_set_slave(_mb, id);
 
-  if (modbus_report_slave_id(_mb, 1, &value); < 0) {
+  if (modbus_report_slave_id(_mb, 1, &value) < 0) {
     return -1;
   }
 

src/ModbusClient.h

@@ -82,14 +82,14 @@ class ModbusClient {
   long inputRegisterRead(int address);
   long inputRegisterRead(int id, int address);
 
-    /**
+  /**
    * Perform a "Read Slave ID" operation for a single slave id.
    *
    * @param id (slave) id of target, defaults to 0x00 if not specified
    *
    * @return slave id on success, -1 on failure.
    */
-  long slaveIdRead(int id);
+  long slaveIdRead(uint8_t id);
 
   /**
    * Perform a "Write Single Coil" operation for the specified address and