diff --git a/lib/sensor_pzem.c b/lib/sensor_pzem.c
index 5780cac..8565e67 100644
--- a/lib/sensor_pzem.c
+++ b/lib/sensor_pzem.c
@@ -39,8 +39,6 @@
 #define SENSOR_PZEM_USART 2 /**< USART peripheral */
 /** @} */
 
-#define USART_BAUDRATE 115200 /**< serial baudrate, in bits per second (with 8N1 8 bits, no parity bit, 1 stop bit settings) */
-
 /* input and output ring buffer, indexes, and available memory */
 static uint8_t rx_buffer[7] = {0}; /**< buffer for received response */
 static volatile uint8_t rx_i = 0; /**< current position of read received data */
diff --git a/lib/sensor_pzem.h b/lib/sensor_pzem.h
index a7aceb6..abbf5df 100644
--- a/lib/sensor_pzem.h
+++ b/lib/sensor_pzem.h
@@ -23,7 +23,7 @@
 /** a measurement response has been received */
 extern volatile bool sensor_pzem_measurement_received;
 
-/** measurements offered by energy meter */
+/** measurements offered by electricity meter */
 enum sensor_pzem_measurement_type_t {
 	VOLTAGE = 0,
 	CURRENT = 1,
@@ -32,7 +32,7 @@ enum sensor_pzem_measurement_type_t {
 	MAX
 };
 
-/** measurement returned by energy meter */
+/** measurement returned by electricity meter */
 struct sensor_pzem_measurement_t {
 	enum sensor_pzem_measurement_type_t type; /**< measurement type */
 	bool valid; /**< is the measurement valid (e.g. format and checksum are correct) */