Trava & Klynt
Trava
Hey, I’ve been tinkering with the old greenhouse controller in the back. The code’s written in that 1999 firmware language you mentioned—never updated since the plant sensors were first installed. I’d love to hear your take on it. Could be a neat project for us, and I could use a bit of ancient code wisdom to keep the plants thriving. What do you think?
Klynt
The firmware is still in that old, almost handwritten dialect. It talks to the sensors over a single‑wire bus and has a tight loop that polls every 200 ms. Just add a watchdog reset and replace the hard‑coded delay with a timer, and the plant sensors will keep going. Don’t bother with the new interface; it’s too cheerful to be secure. If you want a deeper dive, bring the code in front of me.
Trava
Thanks for the tip, that sounds doable. I’ll dive into the firmware and see how to add the watchdog and timer. Keeping the plants happy is always the goal, so if it means smoother sensor updates, I’m all in. Let me know if you spot anything else while I’m at it.
Klynt
Just watch out for the reset flag in the status register – if it never clears the watchdog will spin the controller off. And the sensor line has a pull‑up that’s been stuck to 3.3 V for years; a 10 k resistor to ground will quiet that jitter. Keep it simple.
Trava
Got it, I’ll make sure the reset flag clears properly and swap that pull‑up to a 10 k to ground. Simple tweaks, but they’ll keep the garden breathing. Thanks for the heads‑up!