feat(utils): supported limited number of i2c lock tries

ssube · Dec 23, 2019 · 173168c · 173168c
1 parent 2e87fca
commit 173168c
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/prometheus_express/utils.py b/prometheus_express/utils.py
@@ -13,9 +13,15 @@ def check_network(eth):
     return True
 
 
-def scan_i2c_bus(i2c):
+def scan_i2c_bus(i2c, timeout=10):
+    attempt=0
+
     while not i2c.try_lock():
-        pass
+        if attempt < timeout:
+            attempt += 1
+            pass
+        else:
+            return False
 
     print('I2C devices:', [
         hex(x) for x in i2c.scan()