make dht22 errors unsigned int, so we don't wrap into negative

diff --git a/rpi_promini/rpi_promini.ino b/rpi_promini/rpi_promini.ino
index 5fea227..38d318d 100644 (file)
--- a/rpi_promini/rpi_promini.ino
+++ b/rpi_promini/rpi_promini.ino
@@ -107,7 +107,7 @@ void setup() {
 int serial_pos = 0;
 char serial_data[2]; // socket (0-9), state (0-1)
 char binary_data[32];
-int dht22_errors = 0;
+unsigned int dht22_errors = 0;
 
 unsigned long time = millis();