LoPy 4 in a factory

[robert-hh]

@william What do you call a "hight frequency" machine? Besides that, I would place the Lopy in a well shielded metal box, and add filters to the power supply lines. You may also consider to put the Lopy power supply inside the shielded box.

[William]

@robert-hh
I mean "High-frequency induction hardening", Sorry my bad English....

[William]

@robert-hh
If I don't have any shielded boxes.
This will cause message messy?

[crumble]

@william said in LoPy 4 in a foctory:

This will cause message messy?

Do you mean the LoRa messages? Be aware that Lora is no point2point connecteion. You revceive all messages from your selected channel. So you will get messages from other LoRa users as well. It works like a CB radio or PMR, but with more rules.

You can choose between two solutions:

• Design a protocol, so that you can detect your messages and ignore all other.
• Join a network like TTN. You will get the protocol for free and may benefit from the long range (of the internet).

[robert-hh]

@william The dump below does not look like a noisy LoRa message. It looks more like the LoPy crashed because of other interference, spikes on the supply, ....
A closeby high frequency, high energy induction machine is definitely not a friendly environment for unshielded electronics.

[William]

@crumble Design a protocol? Do not use LoRa?
Sorry I don't that mean.
Could you tall me more?

Thanks,

[William]

@robert-hh
Okay, I need to make a shielded box to protect power supply, right?
I thought that was happen because the antenna, but it wrong.
Thank you.

[robert-hh]

@william Not only for the power supply, but all other interferences into the circuit. The antenna must be assembled into outside the box' wall, and with that box, it will also work better.

[William]

@robert-hh, Thank you. But I still have few questions.

1. In lopy, there have "Power Management IC" and "AC to DC".
   These can't filter interference?

2. I have set watchdog in lopy script.
   It's not work. why?

Thanks,

[robert-hh]

@william About topic 1: I do not know that the LoPy has any of that by itself. There is a 3.3V power regulator, but thta cannot handle string interference, which may com in at each and every signal line.
Topic 2: The watchdog is software, can handle some run-away software situation. You might need a separate hardware watchdog which pulls reset.