Iotawatt status: inactive


Recently we installed a new iotawatt device on our solar project. It has been showing Inactive on Emoncms. On restarting the device, the light has been blinking red-red-red sequence. Kindly, help me as to what should be the next step in troubleshooting?


Hi @sawayra,

Should be able to figure this out. The blinking red-red-red is a catchall halt indicator that is most common when a bad configuration file is encountered, The other possible cause is a corrupted datalog file.

So to figure this out, first can you provide a little more background and context by answering these questions:

  1. About when did you install the IoTaWatt?
  2. Was it successfully installed and posting to eMoncms?
  3. For about how long?
  4. About when did it stop posting to eMoncms? (plot one of your feed and see where it stops)
  5. If you power cycle the IoTaWatt, does the LED go right to the red-red-red or does anything else happen before then?
  6. Have you ever opened up the IoTaWatt and/or removed the SDcard?

Sorry you’re having this problem. Hardware problems are extremely rare, so should be able to get it going.


Answer 1: The iotawatt was recently installed one month ago on October, 1st 2018.
Answer 2&3 : yes it was installed perfectly and showed the reading on EmonCMS for about 12 hours but after that showing inactive status.
Answer 4: on October 2nd 2018 at about 23:00 pm it stop posting to EmonCMS and still showing inactive status.
Answer 5: on restarting LED blinks red-red-red but the blinking is not in the pattern( not the same interval every time) but just after the power cycle it starts blinking.
Answer 6: No , not yet. We have bought new iotawatt so never do anything with SD card or other internal components.

Thank you.
Looking forward for your reply.


Thanks for that detail. It helps narrow down the exposure to known problems. If you changed the auto-update class to ALPHA or BETA, you would have installed release 02_03_16, which had a few problems with the data log that exhibited similar symptoms.

The way forward involves looking at the contents of the SD card. Since the IoTaWatt is not running, the card would need to be removed and mounted on another computer. If that is something you can do, I can walk you through what needs to be done.

If you do not want to do that, depending on where you bought the unit, we can get it serviced. If you are in North America and want to send it to me, I can take care of it. If you got it from OEM, I can arrange for them to handle it.

So let me know how you want to proceed. If you can handle the removing and modifying the SD card contents, I’ll first want you to post the message log, and depending on what is there, either fix the CONFIG.TXT file or remove damaged datalog files.


Actually I am about 300 km away from my project. So, hopefully at weekend I’ll visit my project. The procedure you have mentioned ( reading the SD card on computer) is what I can do. But the problem is I have no idea how to open the iotaWatt device and how to remove the SD card. Can you please guide me the steps.

Thank you.
Looking forward for your reply.


Sure. Turn the IoTaWatt over and pull out the rubber feet:

Remove the phillips head screws in the holes.

While holding the unit by the side panels, lift off the cover from the end opposite to the USB and AC connections.

The microSD card will be plainly visible. It is fragile, so grasp it between two fingernails and pull it out carefully.

Once you get it mounted in another computer, please copy the /CONFIG.TXT file and the /IOTAWATT/IOTAMSGS.TXT files for further diagnosis in case my guess is wrong.

Now delete the IOTAWATT directory.

Replace the SD card snugly, reassemble, and power up. It should be working.

Depending on your auto update status, it may take up to a minute to update to new the latest release. That’s a good thing because the latest release will produce diagnostics and try to fix this problem if it occurs.


Ok. I will do this. Thank you so much for your help. I’ll get back to you if any further information is needed.