We have built a new version with a better price, you can check it here

Wifi DataLogger with long battery life

Industrial and commercial projects need constant monitoring of sensors and collection of data in a format which is readily accesible and can be visualized with ease. For solving this problem we have developed a Datalogger and monitoring system which works over Wifi.

What does this mean:

This means the user is able to monitor the temperature sensors connected to the datalogger in these simple steps

1. Smart phone (iphone, android ) or your PC sees "DATALOGGER" wifi network, simply connect to it.

2. Download the logged data in the format of Excel readable CSV files

3. See live graphs by clicking following this URL.

This device can be used for monitoring temperature for soil, industrial monitoring systems, vineyards etc. We do provide support to add different type of sensors to cater for other datalogging uses.

What comes with the purchase:

• Datalogger
  
• 2 x Temperature sensors (water proof,  -25 - 125 DegC range)
• 5v Power adapter
  

FAQ:

1. Can this Datalogger connect to other sensors other than the ones which comes with it ?

A. Yes, we already have support for K type thermocouples ( works upto 500 Deg C ) as well as others, just contact us and post your needs we can get it working for you.

2. Will this sensor work in places with no Wifi coverage?

A. Yes, Since this device creates its own Wifi network, it can work in areas where there is no wifi coverage.

3. How does the graph look like?

A. The graphs would have the same look and feel as this one ( NOTE: For the datalogger the data would be 2 Temperature series lines )

4. Can I see a sample of the Excel readable file which the datalogger creates? 

A. This sample CSV file was created by the logger. You can download it and view it in Excel. ( or openOffice ) 

3. Can I get you to add more temperature sensors of the same type to this logger ?

A. The standard package comes with 2 Temp sensors ( -25 - 125 DegC range),  for sure we can add more sensors to the Logger for a small cost.

4. Does this device need any assembling or is this a plug and play device ?

A. This is a plug and play device with no assembling required. You just have to power it and it should just work out of the box.

5. How do I view the graphs once the Datalogger is powered up ?

A. From your Mobile/PC connect to the Wifi network called 'DATALOGGER'. Once connected you can view the graphs by

    accessing this link http://192.168.10.1/sensorframework/graph/graph.html

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Connecting to the internet has not been easier, With the advent of the new IOT ( Internet of things) module ESP8266 its a breeze to connect your microcontroller and

Arduino projects to the internet.

Things you can do with this module:

• Send you sensor data to server
• Send an email every time an event occurs, like someone triggering a PIR sensor while you are out on vacation
• Have an Arduino display what the weather would be like today by getting data from metservices
• See if your plants need watering by having the Arduino send humidity data through wifi
• You fill in the rest with your creativity and imagination

ESP8266 specs

Links:

Detailed technical specs and SDK with examples

• 802.11 b / g / n / d / e / i / k / r support
• Wi-Fi Direct (P2P) support
• P2P discovery, P2P group master mode (Group Owner mode), P2P Power Management
• Infrastructure Network (Infrastructure BSS) station (Station) mode / P2P mode / SoftAP mold
• hardware acceleratorPre-Certification
  
  • CCMP (CBC-MAC, counting mode)
  • TKIP (MIC, RC4) o WAPI (SMS4)
  • WEP (RC4)
  • CRC
  • WPA / WPA2 and WPS support
  • Other 802.11i security features:

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What comes as part of the ESP8266 starters kit:

1. Mini Breadboard

. 

2. Breadboard  power supply for providing the 3.3V required by ESP8266

3. ESP8266 module

4. ESP8266 headers, without which you cannot mount them on the breadboard

5. 9V Power Adapter for the breadboard power supply

Complete kit:

Instructions to talking with the ESP8266 with FTDI USB serial or via Arduino:

https://maker.pro/education/how-to-connect-a-raspberry-pi-to-a-laptop-display

FAQ

1. Why is the 9v adapter needed? Can't I power with Arduino's 5V?

A. The Esp8266 can draw upwards of 300mAmps, The Arduino power supply would struggle to power the ESP and the Arduino and cause brownout errors. For this reason having a separate power adapter helps.

Bluetooth Module:

Fig 1: Bluetooth module

This HC-06 Bluetooth module is the most economical and easiest way to go wireless.

This module allows you to wirelessly extend your serial interface, Hence any program running on your Laptop feels its controlling a local serial port (which is over a wireless bluetooth link )

The 4 pins are +5V, GND, TXD, RXD. Supply voltage should be 3.3 - 6 V. Absolute maximum is 7 V.

Default pairing code: 1234

Default baudrate: 9600

HC-04 is almost identical to HC-06. The only difference is that HC-04 is for industry and HC-06 is for civil. Other than that, they are the same. Please refer this HC-04 Datasheet for more technical information.

The maximum baudrate can be configured to 1382400bps, but 115200bps is recommended for reliability purposes. The name and paring code can be re-configured by a USB to Serial converter, the steps for the configuration can be found here.

Below shows how the Bluetooth module is connected to the Arduino or other microcontroller device. The Bluetooth module also works in 3.3 V power supply

Fig 2: Bluetooth module wiring

Once the wires are connected, in the computer under the Bluetooth properties, select ‘Add a device’. The default device name of the Bluetooth module is ‘linvor’

Fig3: Detecting the Bluetooth module

Double click ‘linvor’ and select the ‘Hardware’ tab, you can see which COM port the module is connected. In this example, it is connected to COM 21.

Fig4: Finding the COM port associated with the bluetooth module

You may use any terminal programs, or the open source terminal program puTTY. Download it and double click on the putty.exe, select the ‘Serial’ radio button.

Fig 5: Connecting to the bluetooth module using Putty application

Then type in the COM port number that the Bluetooth device is connecting to. The default baud rate is 9600. Click ‘Open’. And here you go, a new session pops up and if the Bluetooth module’s LED changed from flashing to always on, then it indicates the connection is established.

Test the Bluetooth module : Loopback testing

First test of the bluetooth module is call the the loopback test

• Wiring the Bluetooth to get power from the Arduino

To wire up the Bluetooth, power up the Arduino board (with usb or other power source), connect the +5 V and GND to the Arduino, then short circuit the rx and tx pin. 

By doing this, you’ll receive exactly what you send.

• Bluetooth test from PC

In the Bluetooth device properties of your computer, add the Bluetooth device by selecting ‘add a device’.

The default device name is linvor, and default pairing code is 1234, default baud rate 9600.

The device doesn’t need any driver. Please ignore the ‘unknown device warning’ in the windows device manager.

In the Bluetooth connection property, you can found which COM port the Bluetooth module is connected to.

Note: Until now the LED on the Bluetooth module is still flashing. Launch puTTY, type in the correct COM port and start the session. Soon after the session started, the flashing should stop and the LED on the Bluetooth module should stay on, which indicates that the connection has been established. In default setting, puTTY doesn't echo what you type, and whatever you type in puTTY gets sent to the Bluetooth module. So if you can see what you type in the terminal (non-repeated), it means the Bluetooth received the character you typed and sent it back to puTTY.

For advance users who want to customize the settings of the Bluetooth module, see Bluetooth module configurations. However, you are encouraged to skip this and continue to step3 to get your wireless rover working first!

Bluetooth module is not visible to Android phones and Android tablets?
It is reported that Android has some issues with the Bluetooth Serial Port Protocol (SPP). Installing TerminalBT app allows a pairing / connect to the Bluetooth module. This link explains it in a bit more detail.

Slow response in Arduino IDE when Bluetooth is enabled

When the Bluetooth of a laptop is enabled, the Arduino IDE becomes painfully slow and it is unusable. This is due to the auto-scanning COM port feature of the IDE. This link explains how to resolve this problem.

Step3: Combine Bluetooth with Motor Shield