📒 Index

• About
• Technologies
  • Configured Platforms
  • Development
  • Pre-Requisites
• Development Environment
  • Build the Firmware
  • Upload firmware
  • Upload the configuration
• Hardwaresetup
  • Components List
  • Wiring Schema
  • Wiring H30A to HX711
• Configuration
  • Upload_Configuration
• Planned Features

🔰 About

This Software is build for Beekeepers, to collect some measurements and allows you to get some insights in your hive.

With this you can automatically measure:

• The Weight
• The Temperature (outside and inside the Hive)
• The Battery Voltage

Also it transmits to any MQTT Server. By using the deep sleep mode, you will can use it nearly several weeks. In addition with a solar cell, you are free to use without a powerplug!

You can Update your device by connecting it to your pc, or you use the OTA method.

Technologies

This project will not work alone, so it has dependencies.

Configured Platforms

Actually it was Build and Testet on the following devices

• D1_Mini
• D1 Mini Huzzah
• ESP 8266 Devboard

📦 Development

📓Pre-Requisites

This Software is based on the Homie for ESP8266 Framework.

The following libaries are required:

• HX711
• RunningMedian
• Homie-esp8266
• ArduinoJson@^5.13.4
• OneWire@^2.3.5
• DallasTemperature@^3.9.1

🔩 Development Environment

First of all, the follwing commands required an installation of Platform IO. You can install it with the follwoing command:

setup-virtualenv

🔨 Build the Firmware

You can Build your firmware very easyly with the following command:

make build-complete

🚀 Upload the firmware

After a successfull build you can upload it to your connected device with:

make upload-firmware

In some cases you have multiple device connected. In this case, you must set the port to upload before with this command:

export PLATFORMIO_UPLOAD_PORT=/dev/ttyUSB0

This upload the firmware throught the /dev/ttyUSB0 port.

📄 Upload the configuration

export PLATFORMIO_UPLOAD_PORT=/dev/ttyUSB0
make upload-config

🔌 Hardwaresetup

The following section will describe the hardware construction

Components List

I Ordered the following parts from my local seller

• 1 x Hx711
• 1 x Solarcell (If you use the POWER of the sun :))
• 1 x Lipo with 3.7 Voltage and 1200 mA
• 1 x H30A Weight cell (from Bosche)
• 1 x Wemos D1 mini Huzzah
• 1 x DS18B20
• 1 x S8050 as minimal switch curcuit.
• 1 x 210R
• 1 x 10K
• 1 x TP4056

Wiring Schema

Together you can wire it up lik this schematic circuit:

Wiring H30A to HX711

I was sometimes confused about the wiring of the loadcell to the HX711. So I decided to write down the wirings here to:

Wiring

Configuration

The Configuration is done with an json file. An example of it looks like this:

{
	"wifi":	{
		"ssid": "SSID",
		"password": "mysecret"
	},
	"mqtt":	{
		"host": "192.168.178.55",
		"port": 1886,
		"base_topic": "",
		"auth": true,
		"username": "username",
		"password": "password"
	},
	"name":"hive-teststand",
	"ota": {
		"enabled":false
	},
	"device_id":"hive-teststand",
	"settings": {
		"sleepTime": 3600,
    	"sendInterval": 320,
        "weightOffset": 244017.00,
        "kilogramDivider": 22.27
  	}
}

The following table will give you more insights about the settings.

Setting	Description
wifi.sid	the wifis name.
wifi.password	The password for the wifi
mqtt.host	The host for the mqtt. This can be a dns name or a ip address.
mqtt.port	The Mqtt Port.
mqtt.base_topic	If there is a prefix required for a topic, then you can set here the basetopic.
mqtt.auth	true when using authentication, or false when not using it
mqtt.username	The username when authentication is configured.
mqtt.password	The password when authentication is configured.
name	This is the device name. This will shown up in the router later
ota.enabled	true to enable _o_ver _t_he _a_ir update.
device_id	The device ID, possible the same as name.
settings.sleepTime	The Sleepingtime in seconds
settings.sendInterval	The intervall to send, the sleep time will be different. When you have a send intervall from 60 seconds and a weight intervall of 90 seconds it will take 2 rounds of wake up
settings.weightOffset	The weight offset. This is neccessary for the adjustment of the weightcell. Because there are some base weights.
settings.kilogramDivider	The divider to get the kilograms.

Upload_Configuration

After you modified the configuration to your setting, you can upload this to your device.

 make upload-config

Planned Features

I use this devices for my hives to. So I am not ready yet.

For future Releases I planning to improve some thing and extend it with the following planned features:

• Support Lora
• Adding custom Webinterface to Configure the Device within the wireles connection
• Adding Maintenance Mode (Especcially when you work at the bees)

Feel free to suggest me more Features.