Building a GAIT/Running Form Analysis Shoe Clip-on Sensor

Question

Hi Nordic, 
 We are building a product in the field of Sports, specializing in running shoes. The concept is to correct running form via analyzing the foot strike of the user. Is it Mid strike? Forefoot Strike or Heel Strike? 
 Something similar to https://www.nordicsemi.com/eng/News/News-releases/Product-Related-News/Wearable-footpod-analyzes-runners-gait-supports-Bluetooth-Smart-wireless-technology-for-performance-improvement-and-injury-prevention/(language)/eng-GB 
 The user will be able to attach the sensor device on his shoe, on the shoes laces or clip it to the side. Then while on the run, he would get real time feedback on his mobile app on how is his performance. 
 Such capability would require multiple sensors on the chip and I want to know if Nordic has a ready solution for this use case? 
 nRF51422 and nRF52832 are the SOCs I was reading about, but not sure how will they be integrated with the sensors on the chip. 
 Am I required to engineer the PCB myself or is there a out-of-box solution available that I can custom configure? 
 If I am required to engineer the PCB for the sensors to work, are there partner firms that provide out-of-box solutions with Nordic SOCs? 
 Please assist me with this information, to help me build the right solution.

ivansanchez · Answer

Ankit Madan said: Such capability would require multiple sensors on the chip and I want to know if Nordic has a ready solution for this use case? 
 Well, a quick search for accelerometers and gyros tells me that there are embedded models with an I&sup2;C interface. The cool thing about I&sup2;C is that you can chain peripherals into a bus, giving you a (theoretical) maximum of a couple hundred peripherals. Hardware limitations can push this number down to 8 or so (read the datasheets for your accels and gyros!). 
 See https://devzone.nordicsemi.com/f/nordic-q-a/1843/i2c-example-with-nrf51822 for more info about getting started with development of I&sup2;C on a nRF chip. 
 If you opt for more bare-metal accels and gyros, have a look at the pin assignments of the 52840 - there should be more than enough. 
 Ankit Madan said: Am I required to engineer the PCB myself or is there a out-of-box solution available that I can custom configure? 
 Out-of-the-box is gonna be impossible for something with multiple sensors like this. You might want to have a look at the nRF51 dongle and grab a couple of accel-gyro breakout boards . That should give you something small enough for prototyping.