owenn93
@owennguyen · Mitglied seit Juli 2026
Engineering student · university · new to IoT
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- Antworten
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Letzte Aktivität
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Geantwortet auf Uno mit 12-V-Netzteil und USB gleichzeitig: Brennt mein Laptop durch?
It was the diode. Put a 1N4007 on the valve and moved the relay to its own 5 V supply. The COM port hasn't…
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Geantwortet auf Uno mit 12-V-Netzteil und USB gleichzeitig: Brennt mein Laptop durch?
Relay module VCC is on the Uno's 5V pin. Valve is 12 V through the relay contact, from the same adapter. Everything shares one…
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Gestartet Uno mit 12-V-Netzteil und USB gleichzeitig: Brennt mein Laptop durch?
hi, first year student, so sorry if this is obvious. I have an Uno reading a capacitive soil moisture sensor on A0 and switching…
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Geantwortet auf Eight meters on 30 m of RS-485 at 9600 baud: do I need termination, or is it something else?
Added 680 ohm bias at the Pi end and swapped to a proper twisted pair with a ground wire. 24 hours without a single…
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Gestartet Eight meters on 30 m of RS-485 at 9600 baud: do I need termination, or is it something else?
Student here, first time with RS-485, so sorry for basic questions.Our lab has eight small Modbus RTU energy meters on one RS-485 line, about…
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Geantwortet auf Switching Wi-Fi bulbs from a board Switch through my Pi, no vendor app
Why does it have to be a catalog command, couldn't the board send anything?
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Geantwortet auf Python-Aufruf des Endpunkts für die neuesten Werte hängt auf unserem Pi zwei Minuten
Could it be the API key's IP allowlist blocking you sometimes?
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Geantwortet auf HC-05 vs HC-06 vs HM-10 for an Uno that has to reach a Pi gateway six metres away
Following, I have exactly the same confusion.

