Interesting new Zigbee soil moisture sensor by Third Realty. Looks well built, capacitive sensing, single AA battery powered. Also measures temperature, integrates in Home Assistant through Z2M
Zigbee soil moisture sensor by Third Realty
Third Reality ZigBee T&H sensors
Got some Third Reality ZigBee T&H sensors to sprinkle around the house. Home Assistant integration through z2m is straight forward, looking good so far. Quite big, but run on couple AAAs
IKEA’s new zigbee motion sensor, the VALLHORN
IKEA’s new zigbee motion sensor, the VALLHORN, finally arrives here. Grabbed couple pcs to test with Zigbee2MQTT in home assistant. No ETA about the PARASOLL and BADRING yet. These seem to expose illuminance as well, interesting
Wireless outdoor temperature sensor
Had to move a wireless outdoor temperature sensor I designed ages ago, noticed a memo inside I left for the future self with last battery change date. Still sending readings every minute since May 2018, thats 4 years and 9 months on couple AAs and still going strong. #IoT #rfm69
Fronius Ohmpilot and PT1000 temp. sensor
Received a @froniussolar Ohmpilot today. It diverts the available PV excess to a hot water tank (or any resistive load), in my case 0-2400W stepless regulation. Installation was trivial. The package did not include a PT1000 temp. sensor,ordering one separately for more control
SAMD21’s internal temperature for sensorless room
SAMD21’s internal temperature seems pretty accurate to measure ambient temperature when on battery power/mostly sleeping. Experimenting with sensorless room temperature monitoring using #LoRaWAN
Low cost monochrome 7 segment LCD display
Dug up an old prototype of a low cost monochrome 7 segment LCD display + DS18B20 temperature sensor + Atmega328 + RFM69 433Mhz transceiver project. 30uA sleep current. e-paper is still relatively more expensive alternative. #IoT
Link to the sensor
@mvdswaluw Link to the sensor: https://www.amazon.de/dp/B00R2U8LLG
Cheap PIR sensor
Testing a cheap PIR sensor, seems to be working fine down to 2.0V with no modifications (strange?). 25uA quiescent current at that voltage. Considering it for a battery powered PIR IoT node. Power consumption at 3.0V:
Optical fluid sensors
Just received one of these optical fluid sensors after 2 months in transit.. No documentation at all, wondering what is the fourth wire for..
Air quality sensor
I just activated a http://luftdaten.info air quality sensor, will be contributing from my home in the suburbs that was missing air quality info. Where I live I measure PM2.5 to be 7.8 µg/m³, but overall air quality in Sofia right now is outrageous.
Software low-pass filter on a remote humidity sensor’s
Added a software low-pass filter on a remote humidity sensor's readings, the result is quite obvious
Wireless battery temperature and humidity sensor revision
This is my latest wireless battery temperature and humidity sensor revision. It is optimized for long range (200m) and long life (2+ years sending once a minute). To be used with the display hub and relay actuator I tweeted recently #IoT #smarthome
Demo of pairing a remote wireless sensor
Demo of pairing a remote wireless sensor, RFM69 based, with main control hub https://youtu.be/r7twp9cV2z4 #IoT #ESP32 #rfm69 #homeautomation
Battery-free sensor tag gathers energy from radio
Battery-free sensor tag gathers energy from radio frequencies https://www.engadget.com/2019/01/15/wiliot-battery-free-sensor-tag/ via @engadget
Sensor saturation has become reality
Connected devices are no longer an innovation, rather an expectation. Sensor saturation has become reality. There is absolutely nothing special about connecting a device to the internet and collecting data from it anymore.#IoT as a buzzword describing the future is probably dead?
Moisture sensor PCBs for a flood detection IoT project
Made some moisture sensor PCBs for a flood detection #IoT project
Battery operated wireless temperature sensor node code
Heavily revised my old battery operated wireless temperature sensor node code, achieved 15% lower current consumption footprint.. #IoT
Using DS18B20/DHT22 temperature sensor with internal pull-up resistors rather than external ones
Testing a 4-line OneWire library change that lets the DS18B20 run off internal pull-ups – no more pesky external 4.7K resistor on SMD boards.
ESP8266 powered web server + LED control + DHT22 temperature/humidity sensor reading
An early ESP8266 experiment: web server, LED control and DHT22 temperature/humidity readings on the $4.50 Wi-Fi chip that shook up DIY IoT.
Interfacing with Paradox home security system attempt 2
Second attempt at decoding the Paradox alarm keypad bus – reading alarm state, PIRs and door/window sensors for home automation use.
My dog as smart wireless DVR sensor
My dog turns out to be an excellent motion sensor – correlating her barking on the DVR with alarm events, 25km from Sofia.
Door sensor
Toying with a cheap magnetic reed switch door sensor – wireless open/close events for doors and windows via a Funky.
Optimizing DS18B20 code for low power applications
Cutting the DS18B20’s 750ms conversion time by dropping resolution – optimizing the sensor code for low power battery nodes.
DHT22 accuracy test part 2/2
DHT22 accuracy test part 2: steady 75.2% readouts against the expected 75% reference – the sensor is vindicated.
DHT22 accuracy test part 1
My DHT22 keeps reading suspiciously high relative humidity, so I set up an accuracy test – part 1, with a 3D printed Stevenson screen.
7 months of sending and still going
7 months on the same CR2032 and the Funky+DS18B20 room temperature node is still transmitting – live chart included.
Dirt Cheap Low Power Wireless Sensor Node using nRF24L01+ 2.4GHz
A dirt cheap wireless sensor node: $3 nRF24L01+ modules and blank DIP ATmega328s on veroboard – how low can the parts bill go?
Using my 1.8 TFT as a Raspberry Pi status display
Turning my 1.8″ TFT into a Raspberry Pi status display showing house telemetry pulled from emonCMS.
Clocking the Funky sensor from RFM12B’s crystal
Clocking the Funky’s ATtiny84 from the RFM12B’s crystal – stable timing for IR and RF experiments the internal oscillator can’t do.
Measuring humidity and temperature with DHT22 and Funky
The DHT11 turned out to be a bad joke, so I upgraded to the DHT22 for outside temperature/humidity feeding my heating automation.
‘Funky’ sensor in store
The Funky sensor is now in the store, with Tobias Floery’s blessing – PCB only, regular, or with the voltage step-up circuit.