Questions tagged [hardware]

For questions concerning IoT hardware, hardware recommendations, and hardware support. Read the full tag wiki before asking for hardware recommendations; there are specific requirements for a good question. Additionally, consider asking at Hardware Recommendations for general hardware questions.

Filter by
Sorted by
Tagged with
18
votes
2answers
2k views

Selecting a microcontroller for a battery operated data collection project

I am planning to measure water level in a well, which is about 10 m deep with maximum water level up to 5 m. My plan is to use ultrasonic sensor HC SR04 to measure depth, transmit it via ZigBee to a ...
20
votes
8answers
8k views

Cheap IoT microcontroller with PoE

Can anyone recommend a simple micro-controller with some I/O (<8) that can be powered using PoE, something cheap like Raspberri Pi Zero. The requirements are: Support PoE integrated. No power ...
18
votes
4answers
829 views

Battery backup for small IoT devices?

I'm making a number of small devices such as temperature sensors, RF433 transmitter and receiver (for controlling and receiving devices => MQTT) mostly using EPS8266. They work fine, and are USB ...
16
votes
1answer
263 views

Is there a way to turn on large numbers of IoT devices remotely?

I have a lot of IoT devices that I am currently working on (read playing with). One of my biggest headaches is turning on the ones I need without climbing under my desk and plugging in a lot of wires. ...
11
votes
1answer
251 views

Reusing / recycling a Petzi Treat Camera?

A few years ago I helped crowdfund a Petzi Treat Camera to feed my pet. Due to a broadcast pushed firmware update that I missed, it was rendered unusable. Thankfully, they did however send me a ...
10
votes
1answer
384 views

Would RPI 3 serve as IoT server with MQTT?

I answered to the below linked question and started to think, what are the hardware specs for running an IoT stack of for example MQTT over LoraWan? Would Raspberry PI 3 survive or not? I do not care ...
10
votes
3answers
723 views

Power reduction for Raspberry Pi GPS/GSM tracker

I've recently built a fully functional IoT GPS/GSM tracker with a Pi Zero for a college project and now that it's finished and done with, I would like to minimize the current draw of the entire system ...
10
votes
1answer
495 views

How can I detect Alexa's current state or change its current state with an external device?

I want to have custom wake-word for Alexa so I want to interface this Amazon Echo with an external device. I am wondering if it is possible to create a proxy device that would wake up Alexa if I give ...