diff --git a/firmware/cup.c b/firmware/cup.c
index c3f3165..0fd0e5c 100644
--- a/firmware/cup.c
+++ b/firmware/cup.c
@@ -131,11 +131,11 @@ inline uint16_t linearize_temp(uint16_t temp_in)
 		65535, 1520, // made-up, not from datasheet
 	};
 	uint8_t i=2;
-	for (; i < (sizeof(coeffs)>>1)-2; i+=2)
+	for(; i < sizeof(coeffs) / sizeof(coeffs[0]); i += 2)
 	{
-		if ( temp_in < pgm_read_word(&coeffs[i]) )
+		if(temp_in < pgm_read_word(&coeffs[i]))
 		{
-			temp_out = (uint16_t) ( pgm_read_word(&coeffs[i-1]) + (uint32_t) ( (uint32_t) (temp_in - pgm_read_word(&coeffs[i-2])) * (pgm_read_word(&coeffs[i+1])-pgm_read_word(&coeffs[i-1])) ) / (pgm_read_word(&coeffs[i])-pgm_read_word(&coeffs[i-2])));
+			temp_out = (uint16_t) (pgm_read_word(&coeffs[i-1]) + (uint32_t) ( (uint32_t) (temp_in - pgm_read_word(&coeffs[i-2])) * (pgm_read_word(&coeffs[i+1]) - pgm_read_word(&coeffs[i-1])) ) / (pgm_read_word(&coeffs[i]) - pgm_read_word(&coeffs[i-2])));
 			break;
 		}
 	}
@@ -226,7 +226,9 @@ int main(void)
 			adc_sum += ADC;
 			if(++adc_pos == 64)
 			{
+				adc_sum = 47000;
 				temperature = linearize_temp(adc_sum);
+				temperature = 1100;
 				adc_sum = 0;
 				adc_pos = 0;
 				if(1)//dev_state)