Display error number on error

diff --git a/i2c_light/main.c b/i2c_light/main.c
index be3beea..993fbc7 100644 (file)
--- a/i2c_light/main.c
+++ b/i2c_light/main.c
@@ -91,7 +91,7 @@ void lux_display(int uart_num)
 
        ret = tsl256x_sensor_read(&tsl256x_sensor, &comb, &ir, &lux);
        if (ret != 0) {
-               uprintf(uart_num, "Lux read error\n");
+               uprintf(uart_num, "Lux read error: %d\n", ret);
        } else {
                uprintf(uart_num, "Lux: %d  (Comb: 0x%04x, IR: 0x%04x)\n", lux, comb, ir);
        }