nrf52832 will disconnect when nb-module reboot or send data

[TankHao]

hi ,our company is developing a product.the product have a nrf52832 and nb-iot module.now have one case: system start normal and mobile connected the ble,but the gap will disconnect when nb reboot or send data ,then the ble will renter adverstising.

thank you!e

[Stian Røed Hafskjold]

Can you check the voltage on nRF52832 VDD? The NB-IoT module probably consumes several hundred milliamps when transmitting. Maybe that leads to a voltage drop, resulting in a reset. Also if the step in crease in voltage is to fast the nRF52832 will reset. A step increase in supply voltage of 300 mV or more, with rise time of 300 ms or less, within the valid supply range, may result in a system reset. (note 6)