diff --git a/ports/esp32/boards/AIRGUARD/modules/mqtt.py b/ports/esp32/boards/AIRGUARD/modules/mqtt.py
deleted file mode 100644
index dfdb6165433b..000000000000
--- a/ports/esp32/boards/AIRGUARD/modules/mqtt.py
+++ /dev/null
@@ -1,32 +0,0 @@
-from umqtt.simple import MQTTClient
-import logging
-from utime import ticks_ms
-
-
-class ThingspeakMQTTClient(MQTTClient):
-    """ Implements MQTT client that knows about thingspeak (server, topic and payload format) """
-
-    def __init__(self, config):
-        self.log = logging.getLogger("tsmqtt")
-
-        super().__init__(client_id=config.MQTT_CLIENT_ID, server="mqtt3.thingspeak.com",
-                         user=config.MQTT_USERNAME, password=config.MQTT_PASSWORD)
-
-        self.log.info("thingspeak mqtt client initialized, server=%s, client_id=%s, user=%s" % (
-        self.server, self.client_id, self.user))
-        self.topic = "channels/" + config.MQTT_TS_CHANNEL + "/publish"
-        self.log.debug("mqtt topic: %s" % self.topic)
-
-        self.publish_interval_s = getattr(config, "MQTT_PUBLISH_INTERVAL_S", 60)
-        self.next_publish_time_ms = 0
-
-    def handle_co2_measurement(self, co2_measurement, temperature_measurement=None):
-        if ticks_ms() > self.next_publish_time_ms:
-            self.next_publish_time_ms = ticks_ms() + self.publish_interval_s * 1000
-            payload = "field1=%d" % co2_measurement
-            if temperature_measurement:
-                payload += "&field2=%d" % temperature_measurement
-            self.log.info("publishing mqtt topic %s, payload: %s" % (self.topic, payload))
-            self.connect()
-            self.publish(self.topic, payload)
-            self.disconnect()