Questions tagged [sensors]

For questions about simple IoT devices that can only monitor the physical world and report these observations. Examples are devices that just monitor the state of your lights, radiator settings, power plugs, fans or door locks. If the device is able to change those settings use the tag [actuators] or a more specific one.

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21
votes
5answers
1k views

Is there any advantage in encrypting sensor data that is not private?

Some sites, such as this article on end-to-end encryption for IoT, suggest that all traffic sent across the IoT network should be encrypted, saying: Enterprises, government agencies and other ...
8
votes
2answers
3k views

Automatically open a garage door when approaching by car?

There is this thing I noticed in my neighborhood: when Sam is waiting for his not-so-automatic door to open, he stops the traffic for 20 or 30 seconds, due to the street configuration. I want to buy ...
22
votes
3answers
6k views

Repurpose ADT sensors

My wife and I just purchased a new house and the ADT Security sensors were still installed, but no keypad panel. After speaking with a Rep on pricing and logistics, we decided not to continue the ...
19
votes
4answers
948 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 ...
9
votes
1answer
594 views

Home automation sensors over WiFi

I want to build a home automation system by hooking up various sensors (e.g., passive IR motion sensors, magnetic door contact switches, vibration detectors, etc.) around the house to detect things ...
2
votes
1answer
45 views

Motion detector system that can be flashed remotely

I want to build a motion detector that performs a similar service to security services, which notify me upon intrusion and provide video feed. The other main requirement is that I can update the ...
13
votes
2answers
693 views

Temperature sensors affected by rain

I am not sure if this is the best place to ask a question like this. I am working with a wireless sensor network that measure temperature, humidity and illuminance. I have read that outside sensors, ...
10
votes
3answers
805 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 ...
8
votes
1answer
463 views

What should be considered when building a wireless sensor network?

This question originates from a question asking about a specific detail about building wireless sensor networks. While answering the question, I wanted to share some general guidelines for the ...
4
votes
1answer
379 views

MongoDB/Redis/CouchDB/Any Graph DB with S3 for IoT implementation

I have an IoT use-case (Should I use the MQTT protocol?) and decided to implement the SMACK architecture. I hope, Up and running the SMACK stack would be very much cost. Right now I am not expecting ...
11
votes
6answers
1k views

Measure people density in an outdoor area

I'm currently working on a project and I need to measure how many people are in an area without any personal interaction. Basically I need to do this in parks. I don't have lot of budget for each ...
10
votes
1answer
752 views

Connecting a sensor to ZigBee

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 ...
6
votes
1answer
186 views

How can I aggregate QS data from different sources on one and unique dashboard?

I would like to automatically aggregate QS data, biofeedback data and neurofeedback data from different applications into one dashboard. Data is collected from; Gear S2, Withings body scale, Withings ...
0
votes
0answers
46 views

Tracking speed and direction of golf ball

I'm working on a prototype for a cheap launch monitor as a cheap alternative to the expensive ones on the market atm. Question: I'm looking for a sensor or sensors that can track the following High-...