diff --git a/src/ModbusClient.cpp b/src/ModbusClient.cpp
index bf4b329..fd8926d 100644
--- a/src/ModbusClient.cpp
+++ b/src/ModbusClient.cpp
@@ -163,6 +163,19 @@ long ModbusClient::inputRegisterRead(int id, int address)
   return value;
 }
 
+long ModbusClient::slaveIdRead(uint8_t id)
+{
+  uint8_t value;
+   
+  modbus_set_slave(_mb, id);
+
+  if (modbus_report_slave_id(_mb, 1, &value) < 0) {
+    return -1;
+  }
+
+  return value;
+}
+
 int ModbusClient::coilWrite(int address, uint8_t value)
 {
   return coilWrite(_defaultId, address, value);
diff --git a/src/ModbusClient.h b/src/ModbusClient.h
index 468e07a..9489b70 100644
--- a/src/ModbusClient.h
+++ b/src/ModbusClient.h
@@ -82,6 +82,15 @@ 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(uint8_t id);
+
   /**
    * Perform a "Write Single Coil" operation for the specified address and
    * value.