Display error number on error

diff --git a/i2c_uv/main.c b/i2c_uv/main.c
index add6bee..3ac79f2 100644 (file)
--- a/i2c_uv/main.c
+++ b/i2c_uv/main.c
@@ -94,7 +94,7 @@ void uv_display(int uart_num)
 
        ret = veml6070_sensor_read(&veml6070_sensor, &uv_raw);
        if (ret != 0) {
-               uprintf(uart_num, "UV read error\n");
+               uprintf(uart_num, "UV read error: %d\n", ret);
        } else {
                uprintf(uart_num, "UV: 0x%04x\n", uv_raw);
        }