diff --git a/README.md b/README.md
index 3545c8a..de66eff 100644
--- a/README.md
+++ b/README.md
@@ -55,9 +55,10 @@ A collection of delicious docker recipes.
 
 ## IoT
 
-- [x] hass :+1:
-- [x] hbdg :+1:
+- [x] hass
+- [x] hbdg
 - [x] node-red :+1:
+- [x] mqtt-io-arm
 - [x] mosquitto :+1:
 - [x] tile38-arm :+1:
 
diff --git a/mqtt-io-arm/Dockerfile b/mqtt-io-arm/Dockerfile
new file mode 100644
index 0000000..411dd02
--- /dev/null
+++ b/mqtt-io-arm/Dockerfile
@@ -0,0 +1,15 @@
+#
+# Dockerfile for mqtt-io-arm
+#
+
+FROM debian:bullseye
+
+RUN set -xe \
+ && apt update -y \
+ && apt install -y python3 python3-pip python3-rpi.gpio \
+ && pip3 install --no-cache mqtt-io \
+ && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+CMD ["python3", "-m", "mqtt_io", "config.yml"]
diff --git a/mqtt-io-arm/README.md b/mqtt-io-arm/README.md
new file mode 100644
index 0000000..5cd0cca
--- /dev/null
+++ b/mqtt-io-arm/README.md
@@ -0,0 +1,22 @@
+mqtt-io
+=======
+
+[mqtt-io][1] exposes general purpose inputs and outputs (GPIO), hardware sensors and
+serial devices to an MQTT server. Ideal for single-board computers such as the
+Raspberry Pi.
+
+## up and running
+
+```
+docker-compose up -d
+docker-compose logs -f
+```
+
+## mqtt sub/pub
+
+```
+mosquitto_sub -v -h test.mosquitto.org -t easypi/#
+mosquitto_pub -h test.mosquitto.org -t easypi/output/light/set -m ON
+```
+
+[1]: https://mqtt-io.app/
diff --git a/mqtt-io-arm/data/config.yml b/mqtt-io-arm/data/config.yml
new file mode 100644
index 0000000..4add9ff
--- /dev/null
+++ b/mqtt-io-arm/data/config.yml
@@ -0,0 +1,20 @@
+# Doc: https://mqtt-io.app/
+
+mqtt:
+  host: test.mosquitto.org
+  port: 1883
+  topic_prefix: easypi
+
+gpio_modules:
+  - name: rpi
+    module: raspberrypi
+
+digital_inputs:
+  - name: doorbell
+    module: rpi
+    pin: 21
+
+digital_outputs:
+  - name: light
+    module: rpi
+    pin: 22
diff --git a/mqtt-io-arm/docker-compose.yml b/mqtt-io-arm/docker-compose.yml
new file mode 100644
index 0000000..cf3514a
--- /dev/null
+++ b/mqtt-io-arm/docker-compose.yml
@@ -0,0 +1,8 @@
+version: "3.8"
+services:
+  mqtt-io:
+    image: easypi/mqtt-io-arm
+    volumes:
+      - ./data:/app
+    privileged: true
+    restart: unless-stopped