How do I power the ESP8266 devices in a Domoticz system on a Raspberry Pi B3+?

Question

Hello, I am looking for a solution to a problem. I have Domoticz set up on a raspberry pi b3+, the other devices, often needing rework, would communicate wirelessly with the Raspberry. What I would like to connect: - lighting control - window contacts - temperature and humidity sensors - camera...

xury · Accepted Answer

You can power it with batteries, e.g. with cheap cases for two or one 18650 cell, so-called power bank cases from aliexpress. For esp8266 you win Easyesp and set deep sleep for 5 minutes. An ESP configured in this way can run on good cells for up to two months.

kaczakat · Answer

If you are looking for a very compact power supply I found something else like this:

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Admittedly, I've got some blue ones, there are 3.3, 5 and 12V versions, and there's a trafo inside too. How to connect - so it can't electrocute anyone or start a fire - these are Chinese toys. I've connected one ESP to such a power supply but I only test it when I'm in the area and away from flammable things.

ociep14 · Answer

Could you describe in simple terms the wiring diagram?

Anonymous · Answer

You have it on the housing. oj... I feel it would be better if a colleague buys some ready-made solutions.

ociep14 · Answer

I am referring to a solution with a battery, for example.

Anonymous · Answer

Deep sleep does not only work in Easyesp. If the author wants to use ESP for his own purposes he would better write his own application. On the other hand Easyesp could be an interesting solution especially as some protocols are already implemented ->

ociep14 · Answer

For lighting control, to be connected behind a switch, the best solution, were these modules? .

TvWidget · Answer

The RPi3 also has a BT4.0 interface and there are a variety of sensors e.g. temperature, humidity etc. battery powered sending data via BLE.

Anonymous · Answer

RPI3 B+ has BT4.2 With BT you have to keep in mind the power of the transmitter because this will determine the range -> and somehow I find it hard to imagine BT with a range of 10m (in open space) for domotics applications.

TvWidget · Answer

Taj as you wrote it all depends on the power of the transmitter in the sensor. The maximum power allowed by law is +20dBm. For such a sensor the range in open space is a few hundred metres and a building 2-3 floors. For a power of +8dBm it is about 50m in open space. Smart bands or other such devices that do not require a long range have a power of -2dBm or less. Here the range can indeed be only 10m.

krzbor · Answer

I am struggling with the same problem as the author. I have several actuator modules on the ESP, and these are mains powered - no problem. Switching to batteries on the ESP is already a major problem. I wanted small devices with a decent design and a lifetime of 1 year. With data every 5 minutes this is unrealistic on an ESP. I opted for BT and Pi 3 for the temperature sensors, the first two sensors being the Xiaomi Mijia Bluetooth Temperature Humidity Sensor. There are scripts that read the temperature directly from these sensors. Unfortunately, there is a problem with the range - they hardly work through the ceiling, and only within a short distance on a given floor (through walls max. about 7m). I decided to test an iNode-based solution. I purchased one module and found that the range was the same. However, I later found out that by default the iNode works at -2dBm, but can be configured for 8dBm. At 8dBm, the iNode is already working for me through the ceiling and was losing at most every other frame. I wait 2 minutes for a readout, so I changed the standard 1s to 5s to reduce power consumption. For a correct reading I therefore need to catch 1 frame out of 24 sent. Reading via bash script in passive mode. I will most likely buy more of these lozenges.

ociep14 · Answer

I found an interesting tutorial on the web: Tutorial . Such a sensor can be configured with Domoticz? What do you think of this solution?

Slawek K. · Answer

What do you mean by sensor? The whole system or just the reed switch itself? In fact it is both, the whole system with NRF24L01 can be connected to Domoticz via MySensors software, or the reed switch using ESP with ESPEasy software as well, there are many possibilities.
Using ESPEasy is simpler, you don't need a hardware gateway at the Raspberry as communication is via WiFi.

Best regards

ociep14 · Answer

Please provide a wiring diagram for the module in the lighting box. . There is a two-wire cable in the box. How to solve the power supply issue.

Slawek K. · Answer

You have to have a third wire, if you have a properly done installation, you have to pull up the N wire to the box, because the L should already be in the box. Greetings

ociep14 · Answer

Can I ask for an explanation of how to connect a bulb (room light) + wall switch to specific inputs on this module?

Slawek K. · Answer

To the 2-pin connector is a 5V power supply, the 3-pin connector is a relay connector, where one is COM (common) and the other two are respectively NO (normally open) and NC (normally closed), The goldpin connector is serial. There is no input on the gpio so push button control is not possible, only via WiFi.

Greetings

ociep14 · Answer

Do you know of any solution for wifi and manual control?

xury · Answer

. Yes connection just like you connect a staircase switch. On one side the staircase switch and on the other the relay contacts. The control can be alternated. The only inconvenience is the lack of real status information.

Anonymous · Answer

Not for relays. This is only useful for measurements.

ociep14 · Answer

I wanted to use the completed equipment (Wemos d1, relay, 230V-5V inverter) somehow. A wifi controlled socket came up as an idea. I'm a beginner, I made myself a supporting drawing to ask you guys if such a configuration has the right to work? I know you can buy off-the-shelf modules, but I'm treating this more as a learning to make my own designs. I don't connect anything to such voltage until I understand the mechanism of operation

Thank you in advance for your valuable answers

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How do I power the ESP8266 devices in a Domoticz system on a Raspberry Pi B3+?

How can I power ESP8266-based Domoticz devices such as sensors, window contacts, and relay modules, and can battery power last for weeks?

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Topic summary

FAQ

Quick Facts

What power options work best for ESP8266 nodes in a Domoticz home-automation setup?

How long will an ESP8266 sensor last on a single 18650 cell?

Can I put an ESP8266 relay module behind a wall switch fed only by two wires?

Which compact 230 VAC→5 V supply is safest for in-wall use?

How do I wire a 5 V relay board to a ceiling light?

Is Bluetooth Low Energy a viable alternative to Wi-Fi sensors?

How do I integrate a low-power door/window sensor from Instructables with Domoticz?

Is EasyESP required for deep-sleep mode?

Can a battery supply drive a relay coil?

How can I have both Wi-Fi control and a physical switch?

Which wires should reach an in-wall automation module?

3-step: How do I enable deep-sleep on ESP8266?

What happens if GPIO16 isn’t tied to RST in deep-sleep setup?