Does anyone know how the half-hourly readings are obtained from SMETS 1 meters. In particular: - Does the meter send the usage in real-time at the end of each half hour?, OR - Does it accumulate a day's readings in half-hour chunks and then send the whole log on a less-frequent basis (e.g. daily)? I found this doc which implies it's the latter, but would be good to know. I'm asking this because I've had the run-around with Octopus on moving to the Go tariff. I have a Secure-branded SMETS 1 meter from my previous supplier that Octopus say they can use. However, so far they have been telling me that they can't get half-hourly readings so can't switch me. After endless calls and mails where they were recommending that I installed a mobile phone network signal booster (SMETS 1 uses the mobile phone network to communicate), they eventually agreed to install a SMETS 2 meter (which uses a different radio network). I've been waiting for an appointment for this. Suddenly though, I got an e-mail out of the blue saying that I could not join Go. Sure enough, on my account page I can now see half-hourly readings. My concern though is that the half-hourly readings may stop as randomly as they started, and if that happens I'll drop back to Octopus's variable tariff - which is 4-5 times the cost of the Go tariff. That risk would be higher if the meter strategy was to send readings each half-hour. I do have weak mobile signal where I live. My suspicion is that actually the meter needed, and has now received, new firmware to collect the half hourly readings - but trying to get any sense out of the help desk there is sort of difficult.