tempd: Attempt retry if 1wire sensor returns "85"

[BME280_driver] / tempd.c

diff --git a/tempd.c b/tempd.c
index 51b9dedc2961fdeb886ef79b895b193c3cf221a1..5120b00b6d0de4bc6a5a843efff9168699c546a0 100644 (file)
--- a/tempd.c
+++ b/tempd.c
@@ -20,7 +20,9 @@ static int read_1wire_temp(const char *path, double *temp)
        char buf[16];
        int fd;
        int ret;
+       int retries = 0;
 
+retry:
        fd = open(path, O_RDONLY);
        if (fd < 0) {
                printf("%s: Failed to open file %s: %m\n", __func__, path);
@@ -42,6 +44,15 @@ static int read_1wire_temp(const char *path, double *temp)
 out_close:
        close(fd);
 
+       if (*temp == 85) {
+               ret = -1;
+               if (retries < 3) {
+                       retries++;
+                       printf("Retrying 1wire read, try %d\n", retries);
+                       goto retry;
+               }
+       }
+
        return ret;
 }