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Questions tagged [calibration]

Use this tag with regard to ensuring that instruments are giving accurate readings as compared to a trusted reference standard.

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QMC5883L automatic calibration

I have a QMC5883L magnetometer, and a pretty basic sketch which just prints the values from X, Y and Z axis to the serial monitor. I want to use it in an application to detect changes in the ...
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Ultrasonic sensor underwater calibration

Does anyone knows how to calibrate AJ-SR04M using the Arduino? I am working on AUV. underwater reading from current code; it is giving continuous 20cm while moving inches. http://shop2.hanjindata1....
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BNO055 restore offsets sketch from Adafruit does not make sense

The restore_offsets sketch from Adafruit BNO055 In some way does not make sense. I am using an ESP32 and storing the offsets of BNO055 in its NVS (non-volatile storage). Steps I start calibrating ...
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Arduino loop over a function is always displaying 0 as final values

I trying to loop over a function in arduino to get values for 2000 times, and then divide it by 2000 to get an average offset: int16_t x_offset = 0; int16_t y_offset = 0; int16_t z_offset = 0; And ...
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How to filter or eliminate earths magnetic field readings around 3D Magnetic sensor?

Im using the SparkFun MAG3110 3D sensor: https://www.sparkfun.com/products/12670 My application is essentially to make a contactless "magnetic joystick" using a local magnet for accurate and constant ...
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MQ135 Gas Sensor Calibration [closed]

I have bought a MQ135 gas sensor. I have read online from multiple sources that a calibration/warm-up period of between 12-24hrs is required for the sensor to give its most accurate readings. I ...
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HC-SR04 calibration conditions

As is known, the speed of sound depends of temperature and Relative Humidity. I'm trying to calibrate HC-SR04 sensor taking account these factors. In SparkFun page there is no mention about ...
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Problems with ACS758 Hall Effect Current Sensors - Calibration and no Signal

I purchased 3 ACS758 Hall Effect Current Sensors datasheet on ebay. A 50,100 and 200A, all three are bi-directional. They look like this. With no current the 50A outputs 477 on the analogue input (2....
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Can't get constant reading with load cells

I'm really a newcomer to arduino and I'm trying to build a scale with four SEN-10245 load cells and a HX711. My issue is that I can't get constant readings in the serial monitor and I'm not sure if my ...
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How can I seriously calibrate ADC voltage readings with Arduino Nano?

I have been using Arduino Nano Analog input to measure voltages, in the range between 22-30 Volts. I want to measure it down to a tenth of a volt. Following the instructions found here: Read ...