What did you build today (Pictures) ?
Compact, simple NRF52 motion sensor
Ebyte E104-BT5032A NRF52832 module
MH-SR602 Motion Sensor
LiFePO4 AA Battery
tssk last edited by
MYS PoE MQTT Gateway with 868Mhz LoRa radio in IP55 85mm x 85mm box
- arduino pro mini 3.3V clone
- SX1276 with spring antenna
- W5500 lite
- 5V 802.3at power over ethernet splitter (gutted)
- SPELSBERG IP55 box
My new arduino project wireless weather mini station with electronic ink display 2.9 inches (GDEH029A1), very low power consumption,compact size, housing with magnets. The device can use si7020 / 21, sht20 / 21, HTU20/21D or BME280 sensors. Use the MINEW MS50SFA RF module with nRF5210, nRF52811, nRF52832 chips, or the EBYTE E73 module with nRF52840 and nRF52833 chips. Soon to be available on openhardware.io
tssk last edited by tssk
Prototype of room sensor for stardard electric box
- arduino pro mini 3.3V
- sx1276 radio
- 2x1.5V AA battery holder
- battery measuring circuit according to https://www.mysensors.org/build/battery
- ABB Tango cover (drilled)
Cover is not fully closed to allow air circulation. But I would preffer some method to drill holes/grill into it - any tips to get decent looking result?
any tips to get decent looking result?
- Drill at low RPM so you don't melt the plastic.
- If you're going to drill a bunch of holes to make a kind of grill, then preferably use a CNC (even a cheap one!) to drill them so that they don't look hodgepodge.
@tssk - really like your design! Well done.
@sundberg84 thanks for creating this thread btw. You got the 1st and 1001st post
Today im testing and outdoor node in a new PCB, but I had mixed csk and ce on the radio (it's a dual radio PCB).
@ncollins Just wondering: why 4 load cells per sensor instead of only one?
- At 50kg per cell, 4 would allow me to actually turn the bed into a huge scale if I decided to go down that route
- I don't believe these are intended to support a significant load for extended periods of time, they can permanently deflect. Given they always have the weight of a king size mattress + boxspring, I wanted to distribute that as much as possible
Current issue: outdoor nodes random stops/disappears - maybe during the time when its high humidity, so trying to try some different approaches i read - this multisensor is getting painted with clear nail polish. Also this PCB is a new board im testing, that Im hoping to be the base for my "final" home automation nodes. Still in dev. but great possibilities!
@sundberg84 Gaskets that are held under tight compression seem to work well at holding out moisture. I've seen a number of commercial products that rely on that and only that for in-ground radio sensors.
Here's an example from the new Flume (version 2) water meter monitor:
It gets strapped to your water meter, typically in the ground. All it has is one gasket to seal out everything. This particular box just snaps closed. No screws! Quite a difference from Version 1, which also used a gasket, but had 12 screws holding it snug.
tssk last edited by tssk
@sundberg84 Really like the shape and look of the PCB! I hope I can achieve similar result for my room sensor.
And another of my completed projects is a mini weather station running on nRF52832 and nRF52840, you can install bme280 or si7021, htu21d. Powered by a single cr2450 battery. As always soon to be on openhardware.io
@berkseo By calling it a mini weather station now you'll need to add an anemometer and rain gauge...
@NeverDie Sorry, I didn't know there were rules like that now :), then it would just be a temperature, humidity and pressure gauge with weather forecasting, okay?
franz-unix last edited by
this is my last node. A 3d printable smart USB power hub.
If someone is interested, here all the details.
I am testing a node with a DigiPyro, PYD 1598 motion detector. It is advertised to be low power and runs from 1.8 to 3.6 volts, so should run well with a coin cell. They have to be programmed with several options and I have not found a lot of documentation. I went with what seemed like the most sensitive choices and it seems to work so far. More research needed . ...
I bought a couple of these from DigiKey for around $4 each. Now they are more than $12 each and there is no stock. So, these may not be as good a choice as they seemed at first. We'll see . ...
Joerideman last edited by
The milling topic got my interest and I have been working on getting a machine for myself.
So far I have just assembled the machine and realised milling is a bit more difficult to start then 3d printing.
anyway, I would like to share my progress. I am building video's now
No circuitsboards yet, but here is a introduction of my way to victory.
BearWithBeard last edited by BearWithBeard
Winter time is tinker time!
This is a compact environmental sensor node with an E-Paper display. My goal was to have a decent screen-to-body ratio with a simple and minimalistic display, easy to read from a distance. It is the first design in which I did not use an ATmega MCU. It is also the first time that I used KiCAD instead of EAGLE, soldered no-lead SMD components and worked with an EPD.
- It features a SHTC3 sensor to measure temperature and relative humidity and a VEML6030 to measure the ambient light, so that I can toggle lights or other appliances in the room based on temperature, humidity or light conditions.
- I have also added a MEMS sensor (LIS3DH) to auto-detect the device orientation and rotate the EPD image accordingly and / or detect tap events to toggle between different display modes / data sets.
- It can be powered directly from a 3V source or use the optional 3.3V boost circuit which accepts 1.5V or 3V sources.
I finished soldering and testing all the components today and just started programming the rough "framework". Looks promising so far! But still lots to do, including finalizing the 3D printed enclosure. This is how it is supposed to look in the end:
Hi guys. I recently made a plant watering control sensor with an electronic paper display. Today I did my first tests, ..everything went well
Take a closer look at the max44009 light sensor and the lis2dw12 accelerometer. You can save a few microamps.
First attempt at a modular NRF52805 based board. The smaller board has a Si7021 temp + humidity sensor and a BH1750 light level sensor, both I2C. Ideally, I should be-able to make other sensor boards with the same footprint as long as the sensors are I2C.
- CR2032 Battery (~1.5 years between battery changes)
- 10P 0.5 FPC connector for programming and serial debugging
- 2 LEDs with solderable jumpers
- On/Off switch (I find this really useful, especially when fighting with coin batteries)
- RST button
- Secondary button that I use to force immediate readings
- Footprint for centered button for alternative use as a remote button (my most common MySensors node)
I'll post pictures of the enclosure when it's ready.
I'm also waiting on delivery of a slightly larger version of this board that holds a 2477 battery and a SMD PIR motion sensor.
Very, very beautiful project! I also already have several such radio modules from different manufacturers. Here are just these ebyte specifically, they are without dc-dc. ...I plan to transfer support from nordic sdk to sandeep mistry (just like I did with 52810 and 52811), but how do you flash them under mysensors? Maybe there is already some shorter way?
@berkseo Thank you!
First, I made the compatibility changes to SandeepMistry. This was surprisingly easy. The SDK in SandeepMistry/nRF5-arduino does most of the heavy lifting. I had to modify a few of the precompiler conditions to exclude PWM, change some serial definitions, and update to new handler naming conventions: https://github.com/sandeepmistry/arduino-nRF5/pull/442
Then, I defined a new Generic NRF52805 variant in mysensors/ArduinoHwNRF5 and handled one assumption of LPCOMP: https://github.com/mysensors/ArduinoHwNRF5/pull/12
Last, I had to handle a few small assumptions in the MySensors library: https://github.com/mysensors/MySensors/pull/1461
Playing around with enclosure designs for my new node
skywatch last edited by
@BearWithBeard Very nice indeed!
Sensor node on the left, button node on the right.
10P 0.5 FPC connector for programming and serial debugging
How many of the 10 pins do you actually use?
@NeverDie Currently using 6, [GND, VCC, SWDIO, SWCLK, - , TX, RX, -, -, -]
The latest addition to my coin cell nodes, a PIR motion sensor based on the Ebyte NRF52805 module.
The PIR sensor is a Senba S16-L221D-2. I'm measuring around 24uA, which is higher than advertised, but with the 6-7uA from the NRF52805, should still get me 3-4 years on a single 2477.
Today i have assembled the latest revision of my Lighting X3 for DIN rail mounting.
Oh yes, I forgot to share photos of my new project - Multinetwork Mysensors Gateway. The main idea of this gateway is that it can at the same time serve up to four different networks (Lora - RFM9X, 2.4 GHz - NRF24 and ISM band RFM69). These networks can be assembled in separate modules and each user can build own set of modules. The incoming stream will be connected via Ethernet on various ports, for example, the gate will have the IP address 192.168.1.128, and each subnet will be served on ports 5003 - the first subnet, 5004 - the second, and so on ...
monte last edited by
@kalina looking great! Is it opensource?
@monte Not certainly in that way. In this project, everything is open source with the exception of the board with an ethernet (based on STM32). The ethernet board was developed by my partners and they are not ready to share it yet. But I hope I can persuade them to do it
@kalina I like how it both consolidates and reduces wall-wart clutter all in one stroke.
I don't see any antennas though. Where do they go? And does having multiple radios packed close together like that create any noteworthy EMI? I knew a guy who had set up an RFM69 hat on his Raspberry Pi but later found that the raspberry Pi produced a lot of RF noise/EMI that reduced the effective range of his gateway. I don't know whether or not that might happen in your case, but I thought I'd mention it to help with your troubleshooting in the event you notice any unexpected range reduction.
monte last edited by
@kalina I see. I have the same STM32 chip and was going to use it in one of my next projects, so I asked to get some inspiration
@NeverDie EMI is a big topic. I think there will be no problems. I am going to do some tests of communication
quality for various modules and antennas. As for the antennas, I am going to fixed them to the body through the holes, but I have not yet decided on the location. As for connection antenna to the module you can see the on photo ...
Hello everyone. I want to show you my new device, battery powered air quality sensor. The device also has light, temperature, humidity, and atmospheric pressure sensors. I am currently testing the software.
@berkseo I'm curious: which air quality sensor did you opt to build into your device, and what about it did you prefer over the other available air quality sensors that you might have picked, but didn't? Two or three years ago I looked into a few different sensors, but they looked bigger that what you've settled on and their capabilities were pretty narrow. Hopefully the sensor offerings have gotten better since then.
@NeverDie sgp40 sensor is used, I also test the bme680, but the results are worse there.
hlehoux last edited by hlehoux
My first RFM69 Battery sensor: an ultrasonic sonar to measure the level of my fuel tank (don't laugh, winters can be cold in Burgundy )
Nice work @hlehoux!
Electronics and fuel sounds like a scary combination to me
hlehoux last edited by hlehoux
@mfalkvidd You're right: For production i'm going to build isolation for the sensor not to be in contact
Anyway: The flash point of domestic fuel oil is 55 ° C, which means that fuel oil cannot ignite below this temperature. In addition, in its liquid form, fuel oil is non-flammable at room temperature.
KooLru last edited by
- Temperature and humidity sensor AHT-10
- NRF52823 module
- Power board CR2477
Connected via MYSX connectors
Firmware based on NodeManager library
franz-unix last edited by
my last creation: the d-diot hub v.3.0
The hub A (wood) is a dual MySensors gateway (RFM69 and NRF24) based on two ESP8266 modules and a BLE gateway + RGB controller thanks to an ESP32 module and ESPHome firmware.
The hub B (grey and red) is an IR gateway and RC 433 Mhz gateway based on ESP32 modules with an ESPHome firmware. The hub B has also an integrated step-up and step-down voltage regulator based on Arduino Nano.
To allow the maximum flexibility in placement inside the house, each module can be build as a stand-alone piece of hardware or combined in a single device (see pictures).
The hub is meant to be used with Home Assistant, the case is 3d printable and as usual, if someone is interested, there is a dedicated wiki page with all the details and the build instructions.
KooLru last edited by
I2S/IIC to MYSX converter
Configurable via jumper matrix
@KooLru - very clever sollution for the lines.
nagelc last edited by nagelc
Hey. Our own berkseo is on Hackaday. Congrats!
Wow, this is unexpected.
I made a simple board to use as a CR2032 battery simulator. It is actually two identical pcb's back to back. I added pins for applying power and another set for measuring current. Now I need a better ammeter. The uA scale works well when sleeping, but the mA scale doesn't seem to pick up the awake current.
electrik last edited by
What is the PCB you are measuring on? I'm actually looking for a NRF5 board to use with a coin cell.
It's actually at this link posted earlier in the thread: What did you build today (Pictures) ?:
I mostly use it with BME280 modules for temperature and humidity, but I have tried some other I2C modules in it.
I'm still experimenting with the motion detector. That will probably get it's own board at some point. It doesn't really fit the enclosure I designed this board for.
I think this open source project is finished. This is a small air quality sensor. Quite a useful thing turned out for our not simple time.
Finished my Garage Door Node.
It has open/close magnetic reed switch sensors, a DS18B20 temperature sensor, a PIR motion sensor and a bjt to trigger the door to open/close/stop.
@KevinT Very cool.
How does it respond to the PIR. Does it stop the door if it sees motion?
The motion sensor is used to turn on the lights in the garage via a Sonoff mini.
Also, I've had the garage door randomly open by itself (power glitches?) a few times over the years. So I'm adding an automation to close the door if no motion is present and it is after midnight.
fsgraz last edited by
A collection of the sensors and actuators I buit for my camper in the past year
the power supply system under the dinette seat
the battery management system (purchased) data are read via wifi by an ESP32, which reports the info to the GW via nRF24L01+.
a closed look at 2 sensors.
the one on the left reads voltage and current from the solar PV panel and to the battery management system
the one on the right reads voltage and current from/to the start and service batteriers
both sensors report instant power and energy.
Fresh water sensor reads the water level, flow and temperature.
has 4 optcoupled outputs to send the information to the 4 LEDs of the original control panel of the camper
gray water tank sensor reports water level with an ultrasound sensor. has an optocoupled output to the "full" LED of the original control panel
bettry supplied temperature and humidity sensor.
I use it in the fridge but also at home, where I have also one with BME280.
A fan controller to help the fridge to work better, controlling the condenser temperature using an optical thermometer sensor.
I have 3 other units, one in the power supply system, one in the closet and one on the roof.
They are all with a PID controller.
fsgraz last edited by
the display node for my camper, based on a Arduino Mega clone
siddarth sid last edited by
This thread is really good, kind of addicting to scroll all time.
Only problem though is the way it is structured. Its really hard to find the same post twice.
Maybe the admins should consider having a separate section for this !!>?
Amit BT last edited by
Ebyte NRF52805 module
Hi, I see you integrated the E104-BT5005A BLE chip in this project.
I’m trying to use it in a simple robot project and having difficulties to make the RX/TX connection with “RF Connect” IOS app.
I already wired the chip to the Seeeduino board and I can find and connect the bluetooth on the RF scan list. But I just don’t know the Arduino code to make it send and receive simple massages on the Arduino serial monitor.
Your help is very much appreciated.