The main reasons can be referred to 4 powerful aspects
“Size, Performance, Safety, Cost”
The compact size module in the main market.
East to fit in any device without space problem.
2. Performance: (Long Working Distance or Double Battery Life Time)
Up to 80~100M communication distance in open space.
For those developers does not need such long working distance can just simply adjust the output power to enhance the battery life time in double!
Easy for mechanical design to build in or can lower down the output power to enhance the battery life time.
Easy to fulfill customer’s specification requirements.
3. Safety Regulation
Full Coverage of Safety Regulation Certified as the valued added service for our customers
Raytac module comes with full coverage of profiles for BT certification (QDID / Declaration ID, also known as DID), and agrees to relabel our DID to customers, which is the unique module provider currently proceeding like this.
Raytac module complied with FCC(USA), Telec (Japan), CE(EU), IC(Canada), KC (Korea), SRRC (China), Taiwan (NCC). According to Module Policy of safety regulation, customer’s end product build by Raytac Module does not need to apply full or part of safety testing (depends on region).
The total initial cost saving may up to US$60,000 for single BT products .
Fair and competitive price strategy
With the effect of economic of scale production and advanced component matching, Raytac provides a reasonable cost of BLE module to compensate all customers a low entry barrier to BLE field
NFC feature is an interesting function in nRF52 series which can help developers and consumers to extent the device flexibility and accessibility.
Mostly, people knows that the NFC for nRF52 can work for paring work only.
Here Nordic Developer Zone introduced the new features of nRF52 for Type 4 Tag in nRF5 SDK.
Thus, not only used as a standard tag type for storing a web link or a text to launch apps and secure BLE pairing as known as Type 2 Tag. (The library already in nRF5 SDK), but also supports more features which enhance a faster communication and exposing data (known as NFC Type 4 Tag). Thus, nRF52 now can even write data to a tag with an NFC Reader/Writer such as smartphone and used in many secure transactions systems.
For more detail information, you can continue the reading in below which quoted from original post, or simply visit Nordic Developer Zone