Build Your Own Hive Monitor By Nick Lambert 18/09/2017 Page No. 1 www.oldmanortwyning.co.uk Nick Lambert
Why build a Hive Monitor? To learn more about your bees and how their hive environment is controlled. Compare behaviour between different colonies/strains of bees What temps are various areas of the brood nest controlled to? Drones, workers, queen cells, larvae, capped brood etc. Does hive temp/humidity change as outside conditions vary? How long does it take for the hive to re-adjust after an inspection? How does the weight of the hive change over time? Can we predict swarming? 28/03/2015 Page No. 2 www.oldmanortwyning.co.uk Nick Lambert
Hive Monitor features Two Temp/Humidity sensors to compare inside/outside hive Five precision temperature probes to monitor the brood nest A hive scale to see how the weight of the hive varies over time 28/03/2015 Page No. 3 www.oldmanortwyning.co.uk Nick Lambert
DHT11 Digital Temperature & Humidity Module 28/03/2015 Page No. 4 www.oldmanortwyning.co.uk Nick Lambert
Temperature and Humidity Module DHT11 Manufactured by AOSONG Electronics Co Ltd Available on Ebay - costs around a pound Measures Humidity and Temperature at approx. 2 sec intervals Works at 3.5 5.5 volts Only three connections used vcc, data, gnd (pin 3 N/C) Typically needs a 5.1K pull up Resistor between pin 1 pin 2 RH 20% 90% +/- 5% Tmp 0 50 0c +/- 2% 28/03/2015 Page No. 5 www.oldmanortwyning.co.uk Nick Lambert
DS18B20 Temperature sensor 28/03/2015 Page No. 6 www.oldmanortwyning.co.uk Nick Lambert
DS18B20 Temperature sensor Maxim (previously Dallas Semiconductors) DS18B20 DS18B20 is 1-Wire digital temperature sensor from Maxim Integrated. Reports degrees in Celsius with 9 to 12-bit precision, from -55 to 125 (+/-0.5). Each sensor has a unique 64-Bit Serial number etched into it - allows for a huge number of sensors to be used on one data bus. Buy 10 for 10 on ebay 28/03/2015 Page No. 7 www.oldmanortwyning.co.uk Nick Lambert
HX711 Load Cell Amplifier 28/03/2015 Page No. 8 www.oldmanortwyning.co.uk Nick Lambert
HX711 Load Cell Amplifier Avia Semiconductor HX711 24-Bit Analog-to-Digital Converter 1.50 on ebay Uses a two wire (Clock & Data line) connection to the Arduino Has four connections to the bathroom scale 28/03/2015 Page No. 9 www.oldmanortwyning.co.uk Nick Lambert
Digital Bathroom scale examples 28/03/2015 Page No. 10 www.oldmanortwyning.co.uk Nick Lambert
Digital Bathroom Scales Get ones with four load cells under a glass plate Must be able to modify it to connect to the load cells so avoid ones with a sealed case. Doesn t need any fancy features - we won t use the existing Logic circuitry. Cheap on ebay approx. 7.00 28/03/2015 Page No. 11 www.oldmanortwyning.co.uk Nick Lambert
Load cell examples 28/03/2015 Page No. 12 www.oldmanortwyning.co.uk Nick Lambert
Wheatstone s bridge 28/03/2015 Page No. 13 www.oldmanortwyning.co.uk Nick Lambert
Arduino uno board 28/03/2015 Page No. 14 www.oldmanortwyning.co.uk Nick Lambert
Arduino micro board 28/03/2015 Page No. 15 www.oldmanortwyning.co.uk Nick Lambert
Arduino microcontroller There are various boards available Based on the ATmega328 chip Starting around 1.50 on ebay. 14 Digital i/o ports 6 Analogue i/o ports 8-16Mhz 28/03/2015 Page No. 16 www.oldmanortwyning.co.uk Nick Lambert
Software Arduino IDE - The Integrated development environment for us to program our Arduino boards. DHT11 Library Software to drive the DHT11 OneWire Library DallasTemperature Library Software to drive the DS18B20 HX711 Library Software to drive the HX711 All this Software is free and download from the net 28/03/2015 Page No. 17 www.oldmanortwyning.co.uk Nick Lambert
Building the Monitor Now lets look at how we connect up the modules and write the software to drive them. 28/03/2015 Page No. 18 www.oldmanortwyning.co.uk Nick Lambert
What s left to do Communication with the monitor Powering the monitor Housing the monitor electronics in sandwich box under the scale Feed sensor wires into hive via the entrance block Protect the DHT from propolis build a butler type cage for it 28/03/2015 Page No. 19 www.oldmanortwyning.co.uk Nick Lambert
Getting the Data home USB stick memory Card Radio Modem (XRF, Xbee etc) Blue Tooth Wifi GSM Cable 28/03/2015 Page No. 20 www.oldmanortwyning.co.uk Nick Lambert
Power Options Battery Solar + Battery Don t use Lipo s without a low voltage cut off circuit. 28/03/2015 Page No. 21 www.oldmanortwyning.co.uk Nick Lambert
Useful links https://www.arduino.cc/ https://arduino-info.wikispaces.com/brick-temperature- DS18B20 https://learn.sparkfun.com/tutorials/load-cell-amplifierhx711-breakout-hookup-guide 28/03/2015 Page No. 22 www.oldmanortwyning.co.uk Nick Lambert
Any Questions? 18/09/2017 Page No. 23 www.oldmanortwyning.co.uk Nick Lambert