atc1441

Basic Manual for DaFit Fitness Tracker firmware update protocol, works for nearly any nRF52832 tracker from Company DaFit

The minimum size of update file is 0x10000(can be filled with garbage to get to size) and the maximum size is 0x2F000
the update will first get stored onto the external flash at position 0x3D1000 by the stock firmware(not by the bootloader)
the size of the update will get stored at 0x3D0000 on external flash with 4 bytes uint32_t

when bootloader gets activated it will copy the update from external flash to 0x23000 of the nRF52 internal flash.


Connect to device,

jupdike

// based on the math here:
// http://math.stackexchange.com/a/1367732

// x1,y1 is the center of the first circle, with radius r1
// x2,y2 is the center of the second ricle, with radius r2
function intersectTwoCircles(x1,y1,r1, x2,y2,r2) {
  var centerdx = x1 - x2;
  var centerdy = y1 - y2;
  var R = Math.sqrt(centerdx * centerdx + centerdy * centerdy);
  if (!(Math.abs(r1 - r2) <= R && R <= r1 + r2)) { // no intersection

johannesjo

function tableToJson(table) {
    var data = [];

    // first row needs to be headers
    var headers = [];
    for (var i=0; i<table.rows[0].cells.length; i++) {
        headers[i] = table.rows[0].cells[i].innerHTML.toLowerCase().replace(/ /gi,'');
    }

    // go through cells

AVatch

import cv2
import numpy as np
from matplotlib import pyplot as plt

# Import our game board
canvas = cv2.imread('./data/box_med.jpg')
# Import our piece (we are going to use a clump for now)
piece = cv2.imread('./data/piece_small.jpg')

# Pre-process the piece