Issue

[tcpipchip]

Can i do some comments ?

[jeanmatthieud]

You can find some explanation on the dedicated article: https://www.iot-experiments.com/nrf51822-and-ble400/

[tcpipchip]

Jean, first of all, congratulations about your Article! It´s really good!!!!!

Your code is running nice in a NRF51822 module!

But i would like to ask some help...if possible...

in piece of code sd_app_evt_wait();

That makes the the NRF51822 in sleep until:

• there is change (interrupt) on gpio
• there is a BLE connection from CENTRAL

Right ?

Do you have some tip to make sd_app_evt_wait() in sleep during only 3 seconds and then execute the updateAdvertisingScanData() in the loop() ?

My idea is to execute updateAdvertisingScanData() each 3 seconds in loop()

Thank you Jean!!!!!

[tcpipchip]

Hi Jean, can you help me ?

[tcpipchip]

Jean

How are you ?

How can i enable the

---

De: Jean-Matthieu DECHRISTÉ notifications@github.com Enviado: quarta-feira, 25 de setembro de 2019 08:51 Para: jeanmatthieud/nrf51822-low-power-sensor nrf51822-low-power-sensor@noreply.github.com Cc: tcpipchip tcpipchip@hotmail.com; Author author@noreply.github.com Assunto: Re: [jeanmatthieud/nrf51822-low-power-sensor] Issue (#1)

You can find some explanation on the dedicated article: https://www.iot-experiments.com/nrf51822-and-ble400/

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/jeanmatthieud/nrf51822-low-power-sensor/issues/1?email_source=notifications&email_token=ACXUZTHEY63V323KVQNIADDQLMRCFA5CNFSM4I2EGEV2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD7REDTA#issuecomment-534921676, or mute the threadhttps://github.com/notifications/unsubscribe-auth/ACXUZTBJX75I644HQ2YN4CTQLMRCFANCNFSM4I2EGEVQ.

[tcpipchip]

Jean

How are you ?

How can i enable the

attachInterruptLowAccuracy

function ?

The platformio cant find it !

Where is this function ?

Thank you so much!

---

De: Jean-Matthieu DECHRISTÉ notifications@github.com Enviado: quarta-feira, 25 de setembro de 2019 08:51 Para: jeanmatthieud/nrf51822-low-power-sensor nrf51822-low-power-sensor@noreply.github.com Cc: tcpipchip tcpipchip@hotmail.com; Author author@noreply.github.com Assunto: Re: [jeanmatthieud/nrf51822-low-power-sensor] Issue (#1)

You can find some explanation on the dedicated article: https://www.iot-experiments.com/nrf51822-and-ble400/

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/jeanmatthieud/nrf51822-low-power-sensor/issues/1?email_source=notifications&email_token=ACXUZTHEY63V323KVQNIADDQLMRCFA5CNFSM4I2EGEV2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD7REDTA#issuecomment-534921676, or mute the threadhttps://github.com/notifications/unsubscribe-auth/ACXUZTBJX75I644HQ2YN4CTQLMRCFANCNFSM4I2EGEVQ.

[jeanmatthieud]

Hi,

If you want to wake up your device every 3 seconds, I think you can do that with a specific timer interrupt. I did not used this kind of functionality yet. To use the attachInterruptLowAccuracy() function, you need to change the platform definition in your platform.ini file as in this repo : https://github.com/jeanmatthieud/nrf51822-low-power-sensor/blob/master/platformio.ini

[tcpipchip]

Hi, timers make the ble stack to stop! I dont know why! Thank you so much to help me! I will test that

Enviado do meu iPhone

Em 29 de out de 2019, às 13:02, Jean-Matthieu DECHRISTÉ notifications@github.com<mailto:notifications@github.com> escreveu:

Hi,

If you want to wake up your device every 3 seconds, I think you can do that with a specific timer interrupt. I did not used this kind of functionality yet. To use the attachInterruptLowAccuracy() function, you need to change the platform definition in your platform.ini file as in this repo : https://github.com/jeanmatthieud/nrf51822-low-power-sensor/blob/master/platformio.ini

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/jeanmatthieud/nrf51822-low-power-sensor/issues/1?email_source=notifications&email_token=ACXUZTC2UPIQ6GRAEJWMNWLQRBNBVA5CNFSM4I2EGEV2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOECRCMUI#issuecomment-547497553, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ACXUZTEMN3J5RNVHJTAIVWLQRBNBVANCNFSM4I2EGEVQ.

[tcpipchip]

hi, falling and rising works

change not

[tcpipchip]

hi, falling and rising works

change not

---

De: Jean-Matthieu DECHRISTÉ notifications@github.com Enviado: terça-feira, 29 de outubro de 2019 16:02 Para: jeanmatthieud/nrf51822-low-power-sensor nrf51822-low-power-sensor@noreply.github.com Cc: tcpipchip tcpipchip@hotmail.com; Author author@noreply.github.com Assunto: Re: [jeanmatthieud/nrf51822-low-power-sensor] Issue (#1)

Hi,

If you want to wake up your device every 3 seconds, I think you can do that with a specific timer interrupt. I did not used this kind of functionality yet. To use the attachInterruptLowAccuracy() function, you need to change the platform definition in your platform.ini file as in this repo : https://github.com/jeanmatthieud/nrf51822-low-power-sensor/blob/master/platformio.ini

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/jeanmatthieud/nrf51822-low-power-sensor/issues/1?email_source=notifications&email_token=ACXUZTC2UPIQ6GRAEJWMNWLQRBNBVA5CNFSM4I2EGEV2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOECRCMUI#issuecomment-547497553, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ACXUZTEMN3J5RNVHJTAIVWLQRBNBVANCNFSM4I2EGEVQ.

[tcpipchip]

Jean, can you implement to us a routine that wakeup the ble processor each 10 seconds ?

Let me know the cost

---

De: Jean-Matthieu DECHRISTÉ notifications@github.com Enviado: terça-feira, 29 de outubro de 2019 16:02 Para: jeanmatthieud/nrf51822-low-power-sensor nrf51822-low-power-sensor@noreply.github.com Cc: tcpipchip tcpipchip@hotmail.com; Author author@noreply.github.com Assunto: Re: [jeanmatthieud/nrf51822-low-power-sensor] Issue (#1)

Hi,

If you want to wake up your device every 3 seconds, I think you can do that with a specific timer interrupt. I did not used this kind of functionality yet. To use the attachInterruptLowAccuracy() function, you need to change the platform definition in your platform.ini file as in this repo : https://github.com/jeanmatthieud/nrf51822-low-power-sensor/blob/master/platformio.ini

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHubhttps://github.com/jeanmatthieud/nrf51822-low-power-sensor/issues/1?email_source=notifications&email_token=ACXUZTC2UPIQ6GRAEJWMNWLQRBNBVA5CNFSM4I2EGEV2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOECRCMUI#issuecomment-547497553, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ACXUZTEMN3J5RNVHJTAIVWLQRBNBVANCNFSM4I2EGEVQ.

[sullivanzheng]

Hi I know this is a very old post, and I wondered if you got any success getting nRF51822 wake up every 3 seconds. What I know as far it that softdevice uses RTC0 as time source so if you set up RTC0 to implement 3 second timer soft device may crash.

Hi, timers make the ble stack to stop! I dont know why! Thank you so much to help me! I will test that Enviado do meu iPhone Em 29 de out de 2019, às 13:02, Jean-Matthieu DECHRISTÉ notifications@github.com<mailto:notifications@github.com> escreveu: Hi, If you want to wake up your device every 3 seconds, I think you can do that with a specific timer interrupt. I did not used this kind of functionality yet. To use the attachInterruptLowAccuracy() function, you need to change the platform definition in your platform.ini file as in this repo : https://github.com/jeanmatthieud/nrf51822-low-power-sensor/blob/master/platformio.ini — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#1?email_source=notifications&email_token=ACXUZTC2UPIQ6GRAEJWMNWLQRBNBVA5CNFSM4I2EGEV2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOECRCMUI#issuecomment-547497553>, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ACXUZTEMN3J5RNVHJTAIVWLQRBNBVANCNFSM4I2EGEVQ.

[tcpipchip]

I had aborted the NRF51 and replace by a NRF52832, using RTOS ZEPHYR Thank you

[sullivanzheng]

How easy is ZEPHYR? (compared to Arduino-nRF5) My feeling is that Arduino-nRF5 is a Arduino core half done, and not smoothly compatible with Soft Device.

I am more or less in the same situation as yours in 2019. Trying very hard to create a Eddystone beacon based on nRF51822 chip + Arduino-nRF5 + BLE_peripheral + Soft device sd_app_evt_wait() to save battery power.

My goal is just to send out temperature and humidity sensor data from a wearable device to a BLE beacon observer.

However, sd_app_evt_wait() is permanently waiting. No code after sd_app_evt_wait() will be executed.

I wondered if ZEPHYR is easier and more up to the task.

Just in case you are interested, here is the Arduino code for this little Eddystone beacon.

// Import libraries (EddystoneBeacon depends on SPI)
#include <SPI.h>
#include <EddystoneBeacon.h>
#define ADVERTISING_INTERVAL 500
#include "nrf_soc.h"
#include "nrf_nvic.h"

//custom boards may override default pin definitions with EddystoneBeacon(PIN_REQ, PIN_RDY, PIN_RST)
EddystoneBeacon eddystoneBeacon = EddystoneBeacon();

void setup() {
  Serial.begin(9600);

  eddystoneBeacon.setAdvertisingInterval(ADVERTISING_INTERVAL);
  eddystoneBeacon.begin(-18, "http://www.example.com"); // power, URI

  Serial.println(F("Eddystone URL Beacon"));

  // enable low power mode
  sd_power_mode_set(NRF_POWER_MODE_LOWPWR);
}

int counter = 0;
void loop() {
  // Enter Low power mode
  sd_app_evt_wait();            // Trapped forever, nothing after this will be executed. I only got a beacon that constantly advertise "http://www.example.com" which I initialized in setup() function.
  // Exit Low power mode

  // Clear IRQ flag to be able to go to sleep if nothing happens in between
  sd_nvic_ClearPendingIRQ(SWI2_IRQn);

  char buf[20];
  sprintf(buf,"http://test.com/%d.html",counter);
  counter++;
  eddystoneBeacon.setURI(buf);

  eddystoneBeacon.loop();
}

I had aborted the NRF51 and replace by a NRF52832, using RTOS ZEPHYR Thank you

[tcpipchip]

much more easy https://zephy-platformio.blogspot.com/2020/03/nina-b112-zephyr-platformio.html

[macvenez]

How easy is ZEPHYR? (compared to Arduino-nRF5) My feeling is that Arduino-nRF5 is a Arduino core half done, and not smoothly compatible with Soft Device.

I am more or less in the same situation as yours in 2019. Trying very hard to create a Eddystone beacon based on nRF51822 chip + Arduino-nRF5 + BLE_peripheral + Soft device sd_app_evt_wait() to save battery power.

My goal is just to send out temperature and humidity sensor data from a wearable device to a BLE beacon observer.

However, sd_app_evt_wait() is permanently waiting. No code after sd_app_evt_wait() will be executed.

I wondered if ZEPHYR is easier and more up to the task.

Just in case you are interested, here is the Arduino code for this little Eddystone beacon.

// Import libraries (EddystoneBeacon depends on SPI)
#include <SPI.h>
#include <EddystoneBeacon.h>
#define ADVERTISING_INTERVAL 500
#include "nrf_soc.h"
#include "nrf_nvic.h"

//custom boards may override default pin definitions with EddystoneBeacon(PIN_REQ, PIN_RDY, PIN_RST)
EddystoneBeacon eddystoneBeacon = EddystoneBeacon();

void setup() {
  Serial.begin(9600);

  eddystoneBeacon.setAdvertisingInterval(ADVERTISING_INTERVAL);
  eddystoneBeacon.begin(-18, "http://www.example.com"); // power, URI

  Serial.println(F("Eddystone URL Beacon"));

  // enable low power mode
  sd_power_mode_set(NRF_POWER_MODE_LOWPWR);
}

int counter = 0;
void loop() {
  // Enter Low power mode
  sd_app_evt_wait();            // Trapped forever, nothing after this will be executed. I only got a beacon that constantly advertise "http://www.example.com" which I initialized in setup() function.
  // Exit Low power mode

  // Clear IRQ flag to be able to go to sleep if nothing happens in between
  sd_nvic_ClearPendingIRQ(SWI2_IRQn);

  char buf[20];
  sprintf(buf,"http://test.com/%d.html",counter);
  counter++;
  eddystoneBeacon.setURI(buf);

  eddystoneBeacon.loop();
}

I had aborted the NRF51 and replace by a NRF52832, using RTOS ZEPHYR Thank you

Hi, are you still interested in this topic? I managed to obtain something similar to what you were mentioning. I'm planning anyway to create a repo about my experiments on NRF51822 (btw I don't think anyone is still interested in NRF51), if you want I can send you my code that works now with very little power consumption (less than 4µA on average sending temp and humidity data every 30 seconds). Let me know

[tcpipchip]

please, yes, continue

[macvenez]

Hi, I created that said repository I would be very happy if someone would like to contribute, I need to add tons of comments and created a good readme. Code snippets are in the readme file. If you have any questions don't hesitate to ask (you should easily find contact info on my profile).