38 votes
Accepted

What is the simplest programmable IoT device that can connect to Wi-Fi?

Check out ESP modules. I've 3 NodeMCU boards running at home checking temperature and humidity, and controlling power sockets and led strips. NodeMCU can be found for about 4-5$. If you want proper ...
Luis Diaz's user avatar
  • 814
31 votes
Accepted

Where can I harvest energy in my home to power my wireless sensors?

DOORS!!! I don't know if it is in the scope of your question but you can't imagine the wasted energy of opening/closing a door! A French comic strip named Gaston Lagaffe written in 1970 introduced a ...
Goufalite's user avatar
  • 3,756
21 votes

Where can I harvest energy in my home to power my wireless sensors?

Solar energy is even indoors an alternative to thermal and vibrational energy harvesting. This indoor photovoltaics use both the natural light and artificial light. On the Feasibility of Indoor Light ...
Ghanima's user avatar
  • 2,539
18 votes

What is the simplest programmable IoT device that can connect to Wi-Fi?

There is Omega2 from the company Onion. They cost 5$. They are still crowdfunding, therefore I'm not sure about their reliability and I haven't used one.. As @Aurora0001 pointed out, Onion completed ...
atakanyenel's user avatar
17 votes

How much power do smart sockets consume themselves?

To understand better the power consumption of smart plugs it's worth peeking into them. To do so let's see some smart plug reference designs. One from Atmel One from Texas Instruments As you can ...
Bence Kaulics's user avatar
17 votes

How much power do smart sockets consume themselves?

Wi-Fi outlets are at about 1.5-2 Watts of power consumption, that's the WeMo as mentioned in Jim's answer, and also a few other ones I've tried, like the TP HS110. ZigBee outlets like the one from ...
Helmar's user avatar
  • 8,430
16 votes

Is MQTT protocol appropriate for transmitting sensor readings over BLE?

MQTT has to run over TCP/IP (I can't remember if it's actually in the spec or if just enough assumptions are made to make it so) but its sister protocol MQTT-SN can be run over nearly any protocol ...
hardillb's user avatar
  • 12.5k
14 votes

Where can I harvest energy in my home to power my wireless sensors?

While having so much valuable answers to my question I have also done some further research about the topic. I have found an additional harvesting solution and also a great reference design about a ...
Bence Kaulics's user avatar
13 votes

What is the simplest programmable IoT device that can connect to Wi-Fi?

As an even cheaper alternative to the NodeMCU from Luis answer I would like to mention the the bare ESP-12E or ESP-12F*, the module that is used on the NodeMCU. They are even cheaper than the NodeMCU, ...
AndreKR's user avatar
  • 231
13 votes

What is the simplest programmable IoT device that can connect to Wi-Fi?

One that I have been keeping an eye on, but haven't tried yet, is VoCore. It was also crowdfunded like the Omega2. It promises a $4-$18 device, but the ones available start at $17.99. What is relevant ...
Simon Munro's user avatar
  • 1,493
11 votes
Accepted

Do Internet-connected lighting systems save energy overall?

That's an awesome question! The influence of IoT in power saving wouldn't be that huge, as you've mentioned. But making them smart enough would save a lot of energy. The radio system and the whole ...
Prashanth Benny's user avatar
11 votes

How much power do smart sockets consume themselves?

A WeMo Rep stated 1.5 Watts for their wall switch on a WeMo forum. I imagine most of these wall/socket switches will draw 1-2 watts in standby. WeMo Community Thread
Jim Bledsoe's user avatar
11 votes

Is MQTT protocol appropriate for transmitting sensor readings over BLE?

Arguably, you'd be better off doing a simple mapping of the data from BLE paradigms to MQTT, rather than trying to literally send MQTT over BLE. BLE generally exchanges data in the form of ...
Chris Stratton's user avatar
11 votes

What is the simplest programmable IoT device that can connect to Wi-Fi?

Defining battery life (and perhaps battery size) will tell you how long your thing has to last. That may then lead you to decide to only switch it on when (a) you need to take a reading and (b) when ...
Cups's user avatar
  • 211
10 votes

What is the power implication of encrypting my sensor traffic?

There are a variety of encryption methods you could use to secure your traffic, and each one has a slightly different power usage, so I'm going to pick a couple of popular choices. The methodology I ...
Aurora0001's user avatar
  • 18.5k
10 votes

Where can I harvest energy in my home to power my wireless sensors?

This is an idea I've had that I'll throw out here... It seems like it should be possible to have a small device that you simply wrap a mains power cord around a few times (or wrap the device around ...
S'pht'Kr's user avatar
  • 201
9 votes

Where can I harvest energy in my home to power my wireless sensors?

This is a great idea to harvest energy from our daily energy use. But you have to consider that the energy you harvest comes from somewhere. If you want to harvest some heat from your room heating ...
le_daim's user avatar
  • 348
9 votes

Where can I harvest energy in my home to power my wireless sensors?

WiFi signals Forget about stealing your neighbor's Wi-Fi to surf the internet. Using cheap everyday materials, researchers at Duke University’s Pratt School of Engineering have developed a remarkable ...
CramerTV's user avatar
  • 191
9 votes

Where can I harvest energy in my home to power my wireless sensors?

Radiators should be a source of vibration (driven from the pump), though you would probably need to investigate the resonance frequencies quite carefully. It is also possible to embed kinetic energy ...
Sean Houlihane's user avatar
9 votes

How much power do smart sockets consume themselves?

This video from 2015 shows an Aeotec Z-Wave Smart Dimmer measured at: ~0.4W idle ~0.6W on but fully-dimmed (no load) I assume these switches have a similar power usage as an outlet/socket, given ...
Phrogz's user avatar
  • 191
9 votes

Power reduction for Raspberry Pi GPS/GSM tracker

I'll assume that the processing requirements on the device are near enough zero. It sounds like you're using some acceleration input to determine how often to wake up the GSM device. Ideally, you ...
Sean Houlihane's user avatar
9 votes

What is the simplest programmable IoT device that can connect to Wi-Fi?

AWS IoT Button The AWS IoT Button is a programmable button based on the Amazon Dash Button hardware. This simple Wi-Fi device is easy to configure and designed for developers to get started with ...
Jonathan's user avatar
  • 191
8 votes

How much power do smart sockets consume themselves?

I measured a number of devices with an ELV Energy Master, which is known to be quite accurate. These are the results: Device off on both on TP-Link HS110 V2 1,2 ...
Hannes's user avatar
  • 191
8 votes

What factors to consider when selecting an integrated wifi MCU for a low powered edge device?

As your most important constraint is having a low power consumption, I think you are already paying attention to the 2 most important parameters: active mode current draw per frequency, and current ...
Leon Carlo Valencia's user avatar
8 votes
Accepted

What is the power implication of encrypting my sensor traffic?

The bulk of your power will likely be expended on RF transmission, not CPU cycles spent in encryption routines. Every additional bit transmitted will cost you more power than the encryption you're ...
John Deters's user avatar
  • 2,522
8 votes

Where can I harvest energy in my home to power my wireless sensors?

An exercise bike/ treadmill rigged to a dynamo. This will also give you an incentive to work out. Rather than using the microwave oven/convection oven which will eat into their function, you can ...
SagarU's user avatar
  • 181
8 votes

Where can I harvest energy in my home to power my wireless sensors?

One often available temperature differential that might be harvested would be: the difference between internal house temperature, and external. With a temperature controlled living environment, ...
spechter's user avatar
  • 181
7 votes

Where can I harvest energy in my home to power my wireless sensors?

You. The average human produces 100 watts of power at rest. That's enough to power about 6 laptops (assuming the estimate of 15 W for a low-end laptop) if you can convert 100% of the power you ...
Aurora0001's user avatar
  • 18.5k
7 votes
Accepted

Power consumption of ANT/ANT+ compared to other wireless sensor network technologies

The ant website has a power estimator which suggests an active 4800 baud connection requires less than 100 uA from a coin cell. I'm not too sure I trust the numbers there though, they look rather ...
Sean Houlihane's user avatar
7 votes
Accepted

Why does Docker reduce power usage on an Internet of Things device in this benchmark?

After some further investigation, I think the issue in the question is that although the power (rate of energy transfer) was reduced, the overall energy consumption was increased by using Docker, so ...
Aurora0001's user avatar
  • 18.5k

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