diff --git a/bathroomheater.yaml b/bathroomheater.yaml
index 9d3c39c..9ba40fc 100644
--- a/bathroomheater.yaml
+++ b/bathroomheater.yaml
@@ -10,6 +10,7 @@ esphome:
 
 packages:
   device_base: !include templates/esp8266.yaml
+  sensor: !include templates/esp8266-vcc.yaml
 
 dallas:
 - pin: D1
diff --git a/blinds.yaml b/blinds.yaml
index d890f70..91dfc27 100644
--- a/blinds.yaml
+++ b/blinds.yaml
@@ -10,7 +10,7 @@ esphome:
 
 packages:
   device_base: !include templates/esp8266.yaml
-  mqtt: !include templates/mqtt.yaml
+  sensor: !include templates/esp8266-vcc.yaml
 
 globals:
 - id: somfy_remote_id_base
diff --git a/templates/esp8266-vcc.yaml b/templates/esp8266-vcc.yaml
new file mode 100644
index 0000000..6ffd5e1
--- /dev/null
+++ b/templates/esp8266-vcc.yaml
@@ -0,0 +1,6 @@
+# Make sure nothing is connected to the A0 pin.
+
+sensor:
+- platform: adc
+  pin: VCC
+  name: "VCC Voltage"
diff --git a/watermeter.yaml b/watermeter.yaml
index 8a34ba3..ef6d7d5 100644
--- a/watermeter.yaml
+++ b/watermeter.yaml
@@ -7,6 +7,7 @@ esphome:
 
 packages:
   device_base: !include templates/esp8266.yaml
+  sensor: !include templates/esp8266-vcc.yaml
 
 sensor:
 - platform: pulse_meter