liam96
@liam-price · Se unió el febrero 2025
Engineering student · university · new to IoT
- Temas
- 8
- Respuestas
- 13
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- 0
Respuestas de foro creadas
The raw -= 65536 fix works, Hermetry shows -12.5 now and the chart doesn’t jump to 6000 anymore. Yesterday’s 6541 points are still sitting in the history, but everything new is right lol. Thanks Aoife.
That explains it, thanks Ciaran. We swapped the NPN proxes for PNP ones (the lab had some), the door and float switch go from +24 V to the inputs, all four show 0/1 in Hermetry now.
We only need on/off states, no counting. Good to know though.
Fixed, but it was two things! Log tab showed keepalive_timeout AND «Taken over by a new session». My first breadboard prototype was still plugged into a USB charger at home with the same token. Unplugged it, switched to the millis() version, and the device has been online for 6 hours.
Got it working on the lab furnace with clark.c’s script and a 10-minute expiry on the Pi side. My first deploy didn’t fire because I’d put the blocks before Save telemetry on the wrong branch, moved them after it. Leaving the request open in case a no-code version ever appears, but the flow does the job for my thesis.
Traducido del English por IA ·
¡funciona!!! Probado desde el autobús. Una cosa que me hizo tropezar: primero creé el comando como Privileged porque conmuta la red eléctrica, y el interruptor de la placa decía que no se puede enviar desde una placa. Lo cambié a Basic y funcionó. Además, ahora me suscribo en on_connect como escribiste; antes dejaba de funcionar después de que el Wi-Fi de la Pi se cortara un momento.
it works!!! tested from the bus. One thing that tripped me: I first made the command Privileged because it switches mains and the switch on the board just said it can’t be sent from a board. Changed it to Basic and it went through. Also I subscribe in on_connect now like you wrote, before it stopped working after the Pi’s Wi-Fi blipped.
Traducido del English por IA ·
Ah, entonces la nube puede responderle al dispositivo? ¿Y cómo entra el teléfono en todo esto?
oh so the cloud can talk back to it? How does the phone come into it though?
Switched to API mode with 10 samples per frame and the radio side is clean now, no lost frames in 20 minutes. The Pi sends x/y/z RMS and peak once a second. My supervisor actually prefers the RMS chart. I didn’t know about the per-device limits at all, that explains the warnings.
Yes. One Serial.println per sample.
Could it be a library conflict with the MQTT lib?
oh nice, didn’t know about dtostrf at all
is it a printf setting in the IDE? I think there’s a flag for floats somewhere
Traducido del English por IA ·
Esto me ayuda mucho. Creo que tenía mezclados los conceptos de «cifrado» y «protocolo». Nuevo plan para el capítulo práctico: comparar SPECK64/128 frente a ChaCha20 en el ATmega328P (ciclos por byte, flash, RAM), y mantener los ESP32 con TLS normal hacia el broker. Mi supervisor se rio de la parte de «en lugar de TLS» cuando le expliqué lo del intercambio de claves, así que supongo que de todos modos estaba bromeando.
This helps a lot. I think I had «cipher» and «protocol» mixed up in my head. New plan for the practical chapter: benchmark SPECK64/128 against ChaCha20 on the ATmega328P (cycles per byte, flash, RAM), and keep the ESP32s on normal TLS to the broker. My supervisor laughed at the «instead of TLS» part when I explained the key exchange bit, so I think he was joking anyway.