This is a list of all the parts I have bought so far, including affiliate links to where I bought the parts and links to relevant posts about them. For my records, as much as anything. Unless I have commented negatively you can assume that the parts arrived within a reasonable time frame (for example I would expect items being posted from China to take a lot longer) and worked for me (I will add a note if I haven’t tested it yet). Of course this does not necessarily mean these are the best places to buy things from, it’s just where I happened to buy them from, so use your own judgement.
Note: The prices shown are the prices I paid and may not be the current price.
| Item | Purchased from | Cost | Notes | Blog post | Datasheet |
| ESP8266 Serial Wifi Wireless Transceiver Module | Ebay | £3.19 | Flashing ESP8266 | Adafruit | |
| 2 x NRF24L01+ Wireless Module 2.4G Communication Module | Amazon | £1.70 | Untested | Sparkfun | |
| [Initial purchase] RF transmitter and receiver kit | Amazon | £1.08 | |||
| RF transmitter and receiver kit | Ebay | £1.38 | |||
| YL – 69 Hygrometer | Ebay | £2.29 | |||
| 10 x LDR G5528 Photoresistor | Ebay | £1.18 | |||
| DHT11 humidity and temperature | Ebay | £1.48 | Testing DHT22 and DHT11 | ||
| DHT22 humidity and temperature | Ebay | £2.09 | Temperature and Humidity (DHT11 and DHT22) on the Arduino | ||
| Raindrops sensor | Ebay | £1.99 | Untested | ||
| 4-channel Bi-Directional Logic Level Shifter Converter 3.3V 5V | Ebay | £1.99 | Untested | ||
| 12V Dosing pump Peristaltic dosing Head | Ebay | £4.39 | Untested | ||
| LCD Character display | Amazon | £1.54 | This took a long time to arrive. | ||
| PAM8403 5V Digital Audio Stereo Player Amplifier Board | Ebay | £0.99 | Untested | ||
| Ranking MB102 Breadboard 3.3V/5V Power Supply Module 3.3V/5V | Amazon | £1.11 | Flashing ESP8266 | ||
| FTDI FT232RL USB to TTL Serial Converter Adapter Module 5V and 3.3V | Ebay | £3.29 | Flashing ESP8266 | ||
| DS18b20 Waterproof digital probe thermometer temperature sensor | Ebay | £2.07 | |||
| USB Nano V3.0 ATmega328 | Ebay | £1.79 | |||
| 2PCS L298N Dual H Bridge Stepper Motor DC L298N Drive Controller Board | Ebay | £2.84 | |||
| 2PCS ESP8266 Serial WIFI Wireless Transceiver Module Send Receive LWIP AP+STA Mo | Ebay | £3.25 | |||
| IIC I2C Logic Level Converter Bi-Directional Module 5V to 3.3V For Arduino M | Ebay | £0.99 | |||
| USB to ESP8266 Serial Wireless Wifi Module Board Developent 8266 Wifi Module M | Ebay | £1.25 | |||
| 2PCS IR Pyroelectric Infrared IR PIR Motion Sensor Detector Module HC-SR501 M | Ebay | £1.41 | Datasheet | ||
| HY-SRF05 Ultrasonic Distance Sensor Module 5Pin Replace SR04 For Arduino Module | Ebay | £0.99 | |||
| Digital BH1750FVI Light intensity Sensor Module For AVR Arduino 3V-5V power M | Ebay | £0.99 | MQTT Connected NodeMCU Weather Station | ||
| 5V Stepper Motor with Drive Test Module Board NEW ULN2003 | Ebay | £1.25 | |||
| MAX7219 dot matrix module Arduino microcontroller module control Display DIY KIT | Ebay | £1.20 | |||
| 0.56″ 7-Segment 4 Digit Super Red LED Display Common Anode Time 12 pins NEW | Ebay | £0.99 | |||
| NodeMcu Lua ESP8266 CH340 WIFI Internet Development Board Module | Ebay | £2.52 | MQTT Connected NodeMCU Weather Station | ||
| LDTR – 0011 5mm RGB LED Module | Gearbest | £0.63 | |||
| LDTR – B00010 10mm 7 Color Light LED RGB Module | Gearbest | £1.25 | |||
| 3904 Soil Humidity Sensor | Gearbest | £0.57 | |||
| BMP280 BOSCH Atmospheric Pressure Sensor Board | Gearbest | £2.41 |