Replied to 2.2.2: devices behind a gateway send data and take commands through it

Perfect timing. I have a Pi 4 reading six energy meters over RS-485 with pymodbus. Which topic do the readings go to, and do…

1 week, 2 days ago

Replied to 2.2.0: the device list and device page, the profile editor, the Commands tab and the device log

Good that Timed out is worded as "outcome unknown" and not as failed. On a weak cell link our boards often run the relay…

3 weeks ago

Replied to TV white space radios or LoRaWAN for a town’s water meters, and is Hermetry City usable yet?

Aisha's right. And the catch is the ecosystem: very few meters speak it, so you'd be tied to that one vendor for the meters…

2 months, 1 week ago

Replied to Keep MQTT open on LTE or reconnect for every send? Trying to cut our data bill

Nice. If the pumps ever need commands, keep in mind a reading batched for 15 minutes doesn't delay those, they come down the open…

2 months, 1 week ago

Replied to Keep MQTT open on LTE or reconnect for every send? Trying to cut our data bill

Your colleague #2 is probably right. A full TLS handshake costs kilobytes, a keepalive ping is tiny.

2 months, 1 week ago

Replied to Read-only filesystem on my RaspAP gateway Pi: what happens to the buffered readings?

SD corruption on power loss is the classic Pi failure. Overlay FS through raspi-config (Performance Options > Overlay File System) works well.

4 months, 3 weeks ago

Replied to Parking bay sensors for a small town pilot: Hermetry City, or plain LoRaWAN and boards?

For the pucks: mount the gateway high and as close as you can, asphalt plus a car on top eats a lot of signal.…

4 months, 4 weeks ago

Replied to Pump relay on an ESP32 clicks at boot and the board switch says On when it isn’t

Moved to GPIO 26 with the HIGH-before-OUTPUT trick, no more click across 20 reboots. Bound the switch to pump_state and the firmware reports after…

6 months, 2 weeks ago