diff --git a/lib/sensor_sdm120.c b/lib/sensor_sdm120.c
index ba6d3e3..77f4951 100644
--- a/lib/sensor_sdm120.c
+++ b/lib/sensor_sdm120.c
@@ -151,7 +151,7 @@ void sensor_sdm120_setup(uint32_t baudrate)
 	gpio_set_mode(GPIO(SENSOR_SDM120_REDE_PORT), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(SENSOR_SDM120_REDE_PIN)); // setup GPIO pin for receiver and driver output enable pin
 	gpio_clear(GPIO(SENSOR_SDM120_REDE_PORT),GPIO(SENSOR_SDM120_REDE_PIN)); // disable driver output and enable receive output
 
-	// setup timer to wait for minimal time before sending transmitting
+	// setup timer to wait for minimal time before next transmission
 	rcc_periph_clock_enable(RCC_TIM(SENSOR_SDM120_TIMER)); // enable clock for timer block
 	timer_reset(TIM(SENSOR_SDM120_TIMER)); // reset timer state
 	timer_set_mode(TIM(SENSOR_SDM120_TIMER), TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock,edge alignment (simple count), and count up