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Heart Rate 7 Click is the newest module from MikroE which uses VEM8080 photodetector has a wide range spectrum from 300nm - 1000nm. To control and acquisition data, AFE4404 from TI inc. is adopted. This chip permits control 3 LED channels, and sample heart rate default 100 SPS.  A 22-bit ADC permit collecting very small changed voltage from a PD sensor. In this example we config Arduino Mega  2650 as below: Pin 4 for RST PIN 5 CLK PIN 6 INT PIN 20 SDA PIN 21 SCL Config registers follow the default of AFE4404 datasheet Page 27 with some minor changes. 1. Config Internal Clock through  AFE_CONTROL2 register addr.: 0x23 value: 0x104218  // setup all dynamic power to save energy 2. Control LED2 current through AFE_LEDCNTRL register addr: 0x22 value: 0x000100 3. Read data using PROG_TG_EN signal through AFE_TIA_GAIN register addr: 0x21 value: 0x000125 Time to start and end of PROG_TG setup through two registers: AFE_PROG_TG_STC register (...

This is my testing for my experiment to use contiki-ng for my cc2650 board on Windows 10. Because Contiki needs an environment like Linux, here we use Docker + Virtualbox to make build and compile more convenient.  Below are there steps to make it. Step 1 . Install Docker Toolbox Notice 1. Using Virtual box 5.2.30 to assure that the Docker Work Notice 2. After install need to restart the windows 10 Notice 3. Config virtual box host-only network Step2 . Pull Contiki-Ng from website Here I put my Contiki-ng in c:/user/myname/Contiki-ng After Docker can setup the connection you need to login to user state of contiki-ng with command docker run --privileged --sysctl net.ipv6.conf.all.disable_ipv6=0 --mount type=bind,source=/c/Users/myname/contiki-ng,destination=/home/user/contiki-ng -e DISPLAY=host.docker.internal:0.0 -ti contiker/contiki-ng Step 3 .   Test an hello-world project in examples folder #include "contiki.h" #include "dev/cc26xx...

From the datasheet and  it's Guide Manual  http://www.ti.com/lit/ug/slau666b/slau666b.pdf BME280 has a slave address: 0x77; To control it we need to config several register as below: Control Humidity Register (ADDR: 0xF2) Default 0x00 not activate Control Measure Register (ADDR: 0xF4) Default 0x00 not activate            b[7:5]: control temperature measurement            b[4:2]: control pressure measurement            b[1-0]: Control IC mode                          00: sleep mode                          01,10: force mode                          11: normal mode Control filter Register (ADDR: 0xF5) Default 0x00            b[7:5]: control standby time ...

Analog-Digital Converter(ADC) with Low gain and High-resolution The reason to use high-resolution (24 bits) ADC is to simplify the hardware, reduce energy consumption (Sigma Delta Structured will be employed). For low-resolution (16bits) ADC, it requires a more complicated system for filtering, high-gain amplifies and apply high-speed anti-aliasing sampling

Serial Port Profile with CC2650 and CC2640R2 (part 2) Modified to transfer ADC values up to PC Step 1:  Include ACD.h library #include <ti/drivers/ADC.h>  Step 2: Insert period event in order to update ADC read values from the potentiometer #define SSSS_ICALL_EVT                         ICALL_MSG_EVENT_ID // Event_Id_31 #define SSSS_QUEUE_EVT                         UTIL_QUEUE_EVENT_ID // Event_Id_30 #define SSSS_PERIODIC_EVT                      Event_Id_00 //SOLUTION // Bitwise OR of all events to pend on #define SSSS_ALL_EVENTS                        (SSSS_ICALL_EVT        | \                                ...

Serial Port Profile with CC2650 and CC2640R2 This test based on code from TI support under link: For CC2650: https://github.com/ti-simplelink/ble_examples/blob/ble_examples-2.2/docs/spp_ble.md For CC2640R2: https://github.com/ti-simplelink/ble_examples/blob/simplelink_cc2640r2_sdk-2.20/examples/rtos/CC2640R2_LAUNCHXL/bleapps/simple_serial_socket_client/readme.md In this experiment, I use CC2640R2 as Server (Peripheral) and CC2650 as Client (Central) as the image below: Step1: import project spp_ble_client_cc2650lp (app and stack) for CC2650 Step2: modify Code of Service in file serial_port_service:               C0E0 ==> C0C0               C0E1 ==> C0C1               C0E2 ==> C0C2 If you don't change, Two Blue Tooth Board cant know to service each other. Step 3: import project simple_serial_socket_client_CC2640r2 for CC2640R2 here we using RealTerm...

Experiment to Custom Profile in BLE CC2640R2 This example is followed a tutor from TI link  http://dev.ti.com/tirex/content/simplelink_academy_cc2640r2sdk_1_14_02_04/modules/blestack/ble_01_custom_profile/ble_01_custom_profile.html#gatt-server-callbacks It bases on Project zero and adds two services to the project. The first Service implemented counting number clicked button The later will update counting service through timer which the period time can changeable.