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nrf52 s132 not connecting properly

Hello, I am using the uart example with modifications to add SAADC and TWIS. It woked well for a while but now it does not connect properly to my iPhone. I reverted to the HRM example. That works but when I reload my application the device name "Nordic_UART" is not shown on the iPhone, the last name is used "Nordic_HRM" but only visible in the UART app on the phone. I get a BLE_GAP connected event then a disconnect this happens 3 times then nothing. I commented out the SAADC and TWIS but no improvement. The pone uart log says connecting to Nordic_HRM, then centralManager.connect(pheripheral, options:nil), a minute later resetting and power on. Any ideas how I can troubleshoot this? Thanks Claude

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