diff --git a/lib/sensor_pzem.c b/lib/sensor_pzem.c
index 998cc15..15291d9 100644
--- a/lib/sensor_pzem.c
+++ b/lib/sensor_pzem.c
@@ -12,10 +12,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-/** library to query measurements from peacefair PZEM-004 and PZEM-004T electricity meter (code)
- *  @file sensor_pzem.c
+/** library to query measurements from peacefair PZEM-004 and PZEM-004T electricity meter
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
+ *  @date 2016-2020
  *  @note peripherals used: USART @ref sensor_pzem_usart, timer @ref sensor_pzem_timer
  */
 
@@ -59,11 +59,11 @@ void sensor_pzem_setup(void)
 {
 	/* enable USART I/O peripheral */
 	rcc_periph_clock_enable(RCC_AFIO); // enable pin alternate function (USART)
-	rcc_periph_clock_enable(USART_PORT_RCC(SENSOR_PZEM_USART)); // enable clock for USART port peripheral
-	rcc_periph_clock_enable(USART_RCC(SENSOR_PZEM_USART)); // enable clock for USART peripheral
-	gpio_set_mode(USART_PORT(SENSOR_PZEM_USART), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, USART_PIN_TX(SENSOR_PZEM_USART)); // setup GPIO pin USART transmit
-	gpio_set_mode(USART_PORT(SENSOR_PZEM_USART), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, USART_PIN_RX(SENSOR_PZEM_USART)); // setup GPIO pin USART receive
-	gpio_set(USART_PORT(SENSOR_PZEM_USART), USART_PIN_RX(SENSOR_PZEM_USART)); // pull up to avoid noise when not connected
+	rcc_periph_clock_enable(RCC_USART(SENSOR_PZEM_USART)); // enable clock for USART peripheral
+	rcc_periph_clock_enable(RCC_USART_PORT(SENSOR_PZEM_USART)); // enable clock for USART port peripheral
+	gpio_set_mode(USART_TX_PORT(SENSOR_PZEM_USART), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, USART_TX_PIN(SENSOR_PZEM_USART)); // setup GPIO pin USART transmit
+	gpio_set_mode(USART_RX_PORT(SENSOR_PZEM_USART), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, USART_RX_PIN(SENSOR_PZEM_USART)); // setup GPIO pin USART receive
+	gpio_set(USART_RX_PORT(SENSOR_PZEM_USART), USART_RX_PIN(SENSOR_PZEM_USART)); // pull up to avoid noise when not connected
 
 	/* setup USART parameters for electricity meter: 9600 8N1 */
 	usart_set_baudrate(USART(SENSOR_PZEM_USART), 9600); // the electricity meter uses a fixed baud rate of 9600 bps
diff --git a/lib/sensor_pzem.h b/lib/sensor_pzem.h
index 19dec12..8488ac7 100644
--- a/lib/sensor_pzem.h
+++ b/lib/sensor_pzem.h
@@ -12,10 +12,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-/** library to query measurements from peacefair PZEM-004 and PZEM-004T electricity meter (API)
- *  @file sensor_pzem.h
+/** library to query measurements from peacefair PZEM-004 and PZEM-004T electricity meter
+ *  @file
  *  @author King Kévin <kingkevin@cuvoodoo.info>
- *  @date 2016
+ *  @date 2016-2020
  *  @note peripherals used: USART @ref sensor_pzem_usart, timer @ref sensor_pzem_timer
  */
 #pragma once