diff --git a/docs/expert_setup.md b/docs/expert_setup.md
index 3039ec8..880255d 100644
--- a/docs/expert_setup.md
+++ b/docs/expert_setup.md
@@ -414,7 +414,8 @@ Raspberry Pi Details:
 
 You will also need to install some python modules:
 ```sh
-sudo apt install python3-smbus i2c-tools
+sudo apt install i2c-tools
+sudo pip3 install smbus2
 ```
 
 More information can be found on Yahboom website, on the page [Installing RGB Cooling HAT](https://www.yahboom.net/study/RGB_Cooling_HAT).
diff --git a/flows/main.json b/flows/main.json
index bad941f..ce66feb 100644
--- a/flows/main.json
+++ b/flows/main.json
@@ -1413,7 +1413,7 @@
         "type": "python3-function",
         "z": "1371dec5.76e671",
         "name": "fan control",
-        "func": "#!/usr/bin/python\nimport smbus2 as smbus\n\nstate = msg[\"payload\"]\n\nbus = smbus.SMBus(1)\n\nDEVICE_ADDRESS = 0x0d\n\ntry:\n    # command happens twice, for reasons\n    if state == \"off\":\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x00)\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x00)\n    if state == \"on\":\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x01)\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x01)\nexcept:\n    pass",
+        "func": "#!/usr/bin/python3\nimport smbus2 as smbus\n\nstate = msg[\"payload\"]\n\nbus = smbus.SMBus(1)\n\nDEVICE_ADDRESS = 0x0d\n\ntry:\n    # command happens twice, for reasons\n    if state == \"off\":\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x00)\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x00)\n    if state == \"on\":\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x01)\n        bus.write_byte_data(DEVICE_ADDRESS, 0x08, 0x01)\nexcept:\n    pass",
         "outputs": 1,
         "x": 1110,
         "y": 40,
@@ -6013,7 +6013,7 @@
         "type": "python3-function",
         "z": "9daf9e2b.019fc",
         "name": "action",
-        "func": "#!/usr/bin/python\nimport smbus2 as smbus\n\nbus = smbus.SMBus(1)\n#turn off LED\nbus.write_byte_data(0x0d, 0x07, 0x00)\n#turn off Fan\nbus.write_byte_data(0x0d, 0x08, 0x00)\n\n#msg[\"payload\"] = str(msg[\"topic\"])+' now'\nreturn msg",
+        "func": "#!/usr/bin/python3\nimport smbus2 as smbus\n\nbus = smbus.SMBus(1)\n#turn off LED\nbus.write_byte_data(0x0d, 0x07, 0x00)\n#turn off Fan\nbus.write_byte_data(0x0d, 0x08, 0x00)\n\n#msg[\"payload\"] = str(msg[\"topic\"])+' now'\nreturn msg",
         "outputs": 1,
         "x": 590,
         "y": 720,