💚 Please check the new version Mini2 https://www.tindie.com/products/11871/ or TeHyBug Universal 18650 environmental data logger which has more features and is much better for battery operations https://www.tindie.com/products/25268/ 💚

What's the difference?

TeHyBug Mini is a minimalistic design of the original TeHyBug and has similar features, it has a half-height of the original TeHyBug. Currently, only two sensor types are supported by AM2320 and DS18b20. TeHyBug Mini is thicker than the original TeHyBug because the sensor is soldered to the back of the board, the thickness with a sensor is about 20mm, the width is also 20mm, the height is 34mm.

Which environmental data does it measure?

• Temperature in Celsius or Fahrenheit
• Humidity in Percentage (AM2320 or DHT22 only)
• Dew point in Celsius or Fahrenheit (AM2320 or DHT22 only)

Which sensor type it uses?

AM2320 or DHT22

It uses a high precision AM2320 or DHT22 Temperature and Humidity sensor like TeHyBug s1:

• Type: DHT22 (AM2302)
• Accuracy resolution: 0.1
• Humidity range: 0-100%RH
• Temperature range: -40~80°C
• Humidity measurement precision: ±2%RH
• Temperature measurement precision: ±0.5°C

OR

• Type: AM2320
• Accuracy resolution: 0.1
• Humidity range: 0-99.9%RH
• Temperature range: -40~80°C
• Humidity measurement precision: ±3%RH
• Temperature measurement precision: ±0.5°C

DS18b20

a temperature sensor like TeHyBug s4

A stainless steel packaged waterproof DS18b20 temperature probe/sensor:

• Type: DS18B20
• Accuracy resolution: from 9 Bits to 12 Bits
• Temperature range: -55°C to +125°C
• Temperature measurement precision: ±0.5°C from -10°C to +85°C
• Stainless steel housing (6 * 50mm), lead length 100cm

BME280:

a high precision Temperature, Humidity and Barometric Air Pressure sensor like TeHyBug s5:

• Type: BME280 sensor
• Accuracy resolution: 0.1
• Barometric pressure range: 300-1100 hPa
• Temperature range: -40-85°C
• Humidity range: 0-100%
• Barometric pressure precision: ±1 hPa absolute accuracy
• Temperature measurement precision: ±1.0°C
• Humidity precision: ±3%

BMP280:

a Temperature and Barometric Air Pressure sensor:

• Type: BMP280 sensor
• Accuracy resolution: 0.1
• Barometric pressure range: 300-1100 hPa
• Temperature range: -40-85°C
• Barometric pressure precision: ±1 hPa absolute accuracy
• Temperature measurement precision: ±1.0°C

BME680:

a high precision Air Quality, Temperature, Humidity and Barometric Air Pressure sensor like TeHyBug s6:

• Type: BME680 sensor
• Accuracy resolution: 0.1
• Barometric pressure range: 300-1100 hPa
• Temperature range: -40-85°C
• Humidity range: 0-100%
• Barometric pressure precision: ±1 hPa absolute accuracy
• Temperature measurement precision: ±1.0°C
• Humidity precision: ±3%

Please note this sensor, like all VOC/gas sensors, has variability and to get precise measurements you will want to calibrate it against known sources! Please run this sensor for 48 hours when you first receive it to "burn it in". After that period of time, the sensor should deliver usable data for air quality.

Which data serving options are available?

• Sending data to a free cloud data logging service at tehybug.com
• Sending data via HTTP POST or GET request to a custom remote Web Server
• Sending data to a custom MQTT broker
• Serving data as a Web-Server on port 80 in form of HTML code or JSON format.
• Receive alerts with a sensor to your mobile phone or via email.

What is it?

TeHyBug (Temperature Humidity Spy Bug) the is ultimate low power environmental data spy-bug for your home. It logs environmental data periodically and sends it to the TeHyBug-Server, your own web server, or MQTT broker like a Raspberry Pi, where you can view the data in a nice daily/hourly graph. Measure the environmental data in your private server room, basement, storeroom, library, greenhouse, etc.

What makes it special?

Create your own weather station. Put it at any place where your wifi network is available. The battery lasts for several months! In our testing environment, the TeHy-Bug with the DHT22 sensor is collecting data for more than a half year. It uses a single 3,7 Volt 18650 LiPo-Cell (depends on sending data frequency and battery type).

What you get?

• A soldered, ready-to-use TeHyBug, with modified ESP8266 ESP-01 module (modification enables the deep sleep mode for power saving).
• The module includes pre-flashed and preinstalled environmental data logging software.
• Detailed first start instructions.

Battery not included

How to start data logging with it?

Before going live with environmental data measurement, you'll have to connect your TeHyBug with a browser to set up an HTTP URL of the data web server and provide your wifi network credentials for internet connection.

Requirements.

The module requires a 3.4 to 11 Volt input voltage. It also requires a connection to a wifi network to send the sensor data.

How to configure the device?

The device has a preinstalled code. In a setup mode, it acts as a wifi station, you'll have to connect your computer to a wifi network TeHyBug_xxxxx and open in your browser the URL: http://192.168.1.1/ a configuration web page will open, where you'll have to provide your wifi credentials so that your TeHyBug can connect to the internet, you will have two choices:

• to use a tehybug.com server as a data server (you'll have to signup at tehybug.com for this and provide your unique TeHyBug key in your account),
• or to use your own web host like Raspberry Pi or any other web host for data fetching where you'll be able to set your own custom URL,
• or to use your own MQTT broker like Raspberry Pi or any other MQTT broker for publishing sensor data where you'll be able to set your own MQTT host,
• or use Blynk, thingspeak, or Domoticz home automation system for logging and displaying data.

Configuration demo video: https://youtu.be/qpJ7f3i-ft8

Configuration main page:

Configuration default mode for a tehybug.com data server:

Configuration HTTP custom mode for your custom data server:

Configuration MQTT custom mode for your custom MQTT broker:

Once again

• You don't need to program the ESP8266 module, you'll receive a TeHyBug with an already uploaded code to it.
• You don't need to flash the ESP8266 module, you'll receive a TeHyBug with already flashed ESP8266 module.
• You don't need to code a data-logging script, I have developed a tehybug.com site that will display the data graph.
• You don't need to modify the ESP8266 module for power saving, you'll get an already modified module.
• All you need is to configure your wifi credentials as described above.

If you'd like to set up your own data server, you can use simple PHP data logging code example from here: https://github.com/gumslone/tehybug

How to improve TeHyBug's battery life and increase its battery operation time?

The battery life depends on the data frequency you set for your TeHyBug. The TeHyBug consumes most of the power during the data measurement and wifi connection, once the wifi connection is established and the sensor data is sent to the data server, the ESP8266 chip goes into a power-saving deep-sleep mode. In battery-powered mode, the data frequency should be set to 30 minutes or more. It also depends on the battery type that you use, by default you receive a TeHyBug with a 9v battery connector, so you can easily use it with a 9v battery. The 9v batteries have a low Ampere-hour capacity so it's recommended to keep the data-frequency high. TeHyBug supports different batteries from 3.4V to a maximum of 11V, so you can use other batteries with it too. In case, you want it to measure the data very often (i.e. every 5 minutes or less), it is recommended to use a power supply, for example, a USB power supply for your TeHyBug.

• The higher you set the data frequency, the longer your TeHyBug will operate in a battery-powered mode.
• The more Ah the battery has, the longer your TeHyBug will operate in a battery-powered mode.

If you have any further questions please feel free to contact me

Other environment data loggers

Please check my store for other IoT and smart home devices.

Regulatory Notice. THIS KIT IS DESIGNED TO ALLOW PRODUCT DEVELOPERS TO EVALUATE ELECTRONIC COMPONENTS, CIRCUITRY, OR SOFTWARE ASSOCIATED WITH THE KIT TO DETERMINE WHETHER TO INCORPORATE SUCH ITEMS IN A FINISHED PRODUCT AND SOFTWARE DEVELOPERS TO WRITE SOFTWARE APPLICATIONS FOR USE WITH THE END PRODUCT. THIS KIT IS NOT A FINISHED PRODUCT AND WHEN ASSEMBLED MAY NOT BE RESOLD OR OTHERWISE MARKETED UNLESS ALL REQUIRED FCC EQUIPMENT AUTHORIZATIONS ARE FIRST OBTAINED. OPERATION IS SUBJECT TO THE CONDITION THAT THIS PRODUCT NOT CAUSE HARMFUL INTERFERENCE TO LICENSED RADIO STATIONS AND THAT THIS PRODUCT ACCEPT HARMFUL INTERFERENCE.