Could you provide more detail information ?
1. Does BMA456 directly use NB-IOT module internal i2c interface, Quectel supplier should provide special hw/sw to enable i2c function.
2、Can chip ID be read?
3、Checked the code, i2c driven is not included in the main function, if necessary, upload complete code.
4、during code running, rather use logic analyzer capture I2C waveform and VDD power supply for further analysis
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