Week 1: Learn about the hardware information of the development board

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Week 1: Learn about the hardware information of the development board [Copy link]

 

1. Unboxing
   • Feelings: It is smaller than expected, and integrates many sensors. However, it would be better if it had an illumination sensor.
2. Firmware Upgrade
   • After downloading the APP, the APP automatically upgraded the firmware when I turned it on for the first time. The upgrade was about 700KB and took several minutes. It felt slow, at least much slower than the Bluetooth-based IAP of my previous product.
3. Experimental entry-level mode
   • Baby Crying Detector can recognize the crying of a baby. I played the audio of a baby crying online. The recognition accuracy and stability still need to be improved .
   • Barometer can measure the values of temperature, humidity, and air pressure, and has curve display and recording functions, which is also the default firmware function.
   • Compass And Level The use of gyroscope, which contains the relevant curves of Euler angles.
   • Data recorder is not currently tested
   • Human Activity recognition can monitor five states: still, walking, running, car, and driving.
   • In-Vehicle Baby Alarm Alarm for crying babies in cars, not tested yet
   • Pedometer is a pedometer, but the experimental results are average. According to my walking posture, the number of steps missed is less than the actual number .
   • Sensor Fusion Sensor fusion is a big deal. I like this experiment very much, but I encountered two problems:
     • The dice has an automatic leveling function, and I can feel that this is to compensate for errors, but it also makes me wonder if the accumulated errors will be too large if there is no application environment where leveling is frequently performed?
     • During one experiment, something went wrong. When I was rotating the dice, one axis of the screen stopped rotating. However, when I laid the experimental board flat, the APP entered the automatic correction mode and the rotation returned to normal.
   • Vibration monitor Vibration monitor can be used for knock detection, etc.
4. According to "SensorTile.box Introduction", Experiment Expert Mode
   • In the free-fall detection experiment, when the sensor module performs free-fall motion, the small light of the sensor lights up and the performance is still very stable.
5. Downloaded the relevant code from the official website.
   • The information is relatively complete, including instructions, source code, circuit diagrams, etc.
6. Other feelings
   • Charging: It can be used while charging, which is good.
   • The battery level display is not smart. The device originally had no power at all. After plugging it into the computer, I immediately connected it to a mobile phone for an experiment. The mobile phone showed that the battery level was not about 65%. This is a bit exaggerated. The charging display accuracy does not start from 0, it should also display below 10%. It is unacceptable that it reached 65% all of a sudden.
   • The expert mode usage routine of "SensorTile.box Introduction", free fall monitoring, and low power performance are not very satisfactory. The battery was completely exhausted in less than a week.
   • Overall, I think this module is very good both in terms of materials and boards!

nmg

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