diff --git a/src/adc.c b/src/adc.c
--- a/src/adc.c
+++ b/src/adc.c
@@ -29,6 +29,11 @@ uint16_t get_viout_counts(void)
 	return adc_readings[ADC_CHAN_VIOUT];
 }
 
+uint16_t get_vgiout_counts(void)
+{
+	return adc_readings[ADC_CHAN_GAIN_VIOUT];
+}
+
 uint16_t get_vbat_counts(void)
 {
 	return adc_readings[ADC_CHAN_VBAT];