Bluetooth

Using Phyphox and ESP32 Bluetooth to Plot Power Supply Voltage vs. External Resistance

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Using Phyphox and ESP32 Bluetooth to Plot Power Supply Voltage vs. External Resistance

1 Introduction After conducting the experiment “Plotting the P-R Characteristic Curve of the Power Supply,” using the existing circuit and making a few modifications to the experimental source code, the microcontroller successfully performed the experiment “Plotting the Relationship Curve between Power Supply Output Voltage and External Resistance.” 2 Circuit Setup for the Experiment Connect a … Read more

Using Phyphox and ESP32 Bluetooth to Plot Power Output vs. External Resistance

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Using Phyphox and ESP32 Bluetooth to Plot Power Output vs. External Resistance

1 Introduction After conducting the “Plotting the Power Supply Volt-Ampere Characteristic Curve” experiment, the microcontroller successfully replicated Teacher Mei’s experiment on “Plotting the Relationship Curve Between Power Output and External Resistance” using the existing circuit with only minor modifications to the source code. 2 Circuit Experiment Setup Connect a 10-ohm fixed resistor in series with … Read more

Using Phyphox and ESP32 Bluetooth for Coil Induction Experiment

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Using Phyphox and ESP32 Bluetooth for Coil Induction Experiment

Recently, the microcontroller obtained a coil and conducted a coil induction experiment using ESP32 and Phyphox. Due to the small inductance of the coil, the induction phenomenon was not very obvious, but the technical solution has been validated. If a coil with more turns and an iron core can be obtained, the experimental effect should … Read more

Design of a Firmware Bluetooth Protocol Vulnerability Mining Framework Based on Virtualization

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Design of a Firmware Bluetooth Protocol Vulnerability Mining Framework Based on Virtualization

Abstract:In recent years, the application of Bluetooth devices has become increasingly widespread. If there are vulnerabilities in Bluetooth devices, it may lead to information leakage, economic losses, and other consequences. However, the firmware updates for Bluetooth devices are often delayed, and some cannot even perform hot updates. Currently, there is a relative lack of tools … Read more

Importance of Medical-Grade Standards in IoT Remote Health Monitoring

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Importance of Medical-Grade Standards in IoT Remote Health Monitoring

The commonly used wireless transmission methods for medical IoT include 5G technology, WiFi technology, and Bluetooth communication technology. From a technical perspective, 5G and WiFi have advantages such as high bandwidth and fast transmission speeds, primarily used for communication between computers, smartphones, etc. Bluetooth communication technology has the benefits of low power consumption and fast … Read more

An Overview of IoT Communication Technologies

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An Overview of IoT Communication Technologies

In the communications field, technological pursuits are constantly advancing. When it comes to the Internet of Things (IoT), various communication manufacturers have already begun to tantalize us. There are many wireless communication technology standards for IoT, which can be divided into two categories based on transmission distance: one category includes Bluetooth/BLE, WiFi, Zigbee, and Z-Wave, … Read more

Using ESP32 and Phyphox to Debug Ultrasonic Distance Sensor

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Using ESP32 and Phyphox to Debug Ultrasonic Distance Sensor

Recently, I found a very magical device in my desk drawer. Upon closer inspection, it turned out to be an ultrasonic distance sensor from a kit given during a Maker Education Instructor training in Zhengzhou back in 2016. This device has been lying in the drawer for nearly 5 years. Is it still usable? I … Read more

Exploring the Relationship Between Photoresistor Resistance and Light Intensity Using ESP32 and Phyphox

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Exploring the Relationship Between Photoresistor Resistance and Light Intensity Using ESP32 and Phyphox

Experimental Scene and Circuit Connection Recently, I found online that a teacher published a paper in a journal, using the voltammetry method to measure the resistance of a photoresistor while measuring light intensity with a light sensor, then plotting the relationship curve of photoresistor resistance and light intensity in a spreadsheet. The steps are cumbersome … Read more

Using ESP32 and Phyphox to Plot the I-V Characteristics of a Diode

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Using ESP32 and Phyphox to Plot the I-V Characteristics of a Diode

Introduction On the third day of the Lunar New Year, we built an experimental circuit on a breadboard to “plot the I-V characteristics of a diode in the conducting state.” A programmable resistor board was used as the internal resistance of the ammeter, a potentiometer was used as a variable resistor to control the circuit, … Read more

Visualizing the Relationship Between Capacitor Charge and Voltage Using ESP32 and Phyphox

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Visualizing the Relationship Between Capacitor Charge and Voltage Using ESP32 and Phyphox

Experimental Scene 1 Introduction Since learning Bluetooth communication with ESP32 and Phyphox during the National Day holiday in 2020, the author has been eager to solve the visualization problem of the relationship between capacitor voltage and charge, attempting to derive the charge amount by integrating the charging current, and then depict the charge-voltage relationship graph. … Read more