Yves Arbour and Rui Santos describes a concept of building a weather station plus data logger using two ESP8266 modules operating in a server/client configuration. The client ESP8266 measures temperature and other sensor inputs and transmits the data to the server ESP8266, which is connected to a PC through a USB-UART bridge. This ESP8266 weather station records the sensor data to a Microsoft Excel sheet on the PC. They used the Things Gateway PC application by Roberto Valgolio to read/write data to the Excel sheets and to generate real-time graphs of sensor measurements.
ESP8266 weather station
Gabriel Francisco designed an automotive acceleration data acquisition system based on Texas Instruments’ LM4F120 series of ARM Cortex-M4 microcontroller. It can be used to sense automotive vibrations in eight directions using single channel analog accelerometers, such as ADXL335 device. The data collected from the sensors are sent to a PC through serial port or Bluetooth, and are analyzed through a PC software.
Automotive acceleration data acquisition system
This project is about building a PC-based temperature and relative humidity logger using the chipKIT Uno32 board and the DHT11 sensor. The project setup requires no additional wires (other than the USB cable) and components; the DHT11 sensor is directly plugged into four I/O pins of the Uno32 board and the project is ready to go. This could be a handy and an easiest way to setup an ambient room monitoring system for a server room. The Uno32 reads the temperature and relative humidity from the DHT11 sensor at preset interval and sends the data to PC through the USB-UART interface. A PC application is developed using the open-source Processing programming platform to log data onto an ASCII file. The PC application also displays the real-time temperature and relative humidity on computer screen.
PC-based logger for temperature and relative humidity
It is a very simple data logger project based on PIC12F683 microcontroller. The microcontroller reads temperature values from a temperature sensor on a regular interval basis and stores them into its internal EEPROM memory. The recorded temperatures can be later transferred to a PC through serial interface. I originally published this project on electronics-lab.com last summer. I thought this could be a very good learning project for beginners, and so I am posting it here for Embedded Lab’s readers too.
Finished temperature logger powered from a 9V battery
“V-USB is a software-only implementation of a low-speed USB device for Atmel’s AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.”
For further details on V-USB and licensing, visit http://www.obdev.at/products/vusb/index.html
This is a data logger project that reads an analog signal, converts into digital number, and sends it to a host computer using Virtual USB. This is a good example application of V-USB. An 8-pin ATtiny45 microcontroller without an external crystal oscillator is used for this demonstration. The beauty of this project is the ATtiny45 presents itself as a USB keyboard to the host computer, and sends the measurements by itself. All you need to do is to open a text editor on the host computer, and press the Start/Stop button on the data logger. The data will be typed automatically on the editor. The sampling time for data logger is set to 1 sec, and an on-board LED indicates the logger is active.