OpenCode experiments...

gauge.py

@@ -26,7 +26,6 @@ import utime
 import ujson
 import gc
 import usocket
-from umqtt.robust import MQTTClient
 from machine import UART
 
 # ---------------------------------------------------------------------------
@@ -898,6 +897,7 @@ def _subscribe_all(c):
 
 def connect_mqtt():
     global client_ref, _mqtt_connected
+    from umqtt.robust import MQTTClient
     info(f"Connecting to MQTT broker {MQTT_BROKER}:{MQTT_PORT} ...")
     last_error = None
     for attempt in range(3):
@@ -986,6 +986,7 @@ def check_mqtt():
         _mqtt_connected = False
 
     log_err("Attempting MQTT reconnection...")
+    from umqtt.robust import MQTTClient
     for attempt in range(3):
         try:
             client_ref = MQTTClient(