What should be considered for choosing a chipset?

Question

What should be considered for choosing a chipset? the followings are in my mind. Could you please tell me if I am correct and if I should consider anything else too. 
 1) size of a chip? 
 2) Tx power? 
 3) ATT MTU? 
 4) How many peripheral devices could be supported? 
 5) Number of packets for each connection interval?

Sigurd · Accepted Answer

Hi, 
 Here is a list over some things that you might need to consider: 
 Amount of Memory (Flash/RAM) needed – more complex applications require more memory 
 Digital interfaces/Hardware peripherals – do you need NFC, USB, SAADC, PWM, I2S, QSPI, etc 
 Radio protocols – BLE 2 Mbps, Long range, Thread , BLE Mesh, IEEE 802.15.4 
 Radio output power – +8dBm needed? 
 Power management - supply voltage range, battery powered, powered from USB, etc 
 How many GPIOs are needed? 
 Package variant 
 Temperature 
 See this link - > https://infocenter.nordicsemi.com/topic/struct_nrf52/struct/nrf52.html 
 
 1) size of a chip? 
 Yes, -> Package variant 
 2) Tx power? 
 Yes 
 3) ATT MTU? 
 No, all our BLE stacks for nRF52 series supports long ATT MTU. 
 4) How many peripheral devices could be supported? 
 Yes, supporting multiple devices to be connected at the same time requires more flash/RAM 
 5) Number of packets for each connection interval? 
 For a 1-to-1 connection then the chip you use does not affect this much, but if you need to buffer a lot of data, or you have multiple connections at the same time, then more RAM will be useful.

Sigurd · Answer

1) 
 No, BLE Mesh is not IPv6 based. For IPv6/6LoWPAN I recommended Thread protocol. 
 nRF5 SDK: https://www.nordicsemi.com/Software-and-tools/Software/nRF5-SDK-for-Thread-and-Zigbee 
 nRF Connect SDK: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.5.1/nrf/ug_thread.html 
 2) 
 Samira said: the chip should be residence for higher temperature? 
 Yes, e.g. nRF52833 has max operating temperature at 105°C

What should be considered for choosing a chipset?

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