Need Sample ADC Program for (ADS1118) with NRF Dongle

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

ovrebekk — Fri, 17 Jun 2022 08:51:31 GMT

Some time ago I made an example showing how to combine Bluetooth and the ADC, feel free to have a look at that:
https://github.com/too1/ncs-peripheral-uart-adc

Best regards
Torbjørn

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Thu, 16 Jun 2022 08:58:45 GMT

Hi,

Can you please provide me the ADC example code with Bluetooth for reading any sensor values

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

ovrebekk — Mon, 09 May 2022 08:45:34 GMT

You welcome 🙂

Then I will consider the case closed, unless you have more questions.

Best regards
Torbjørn

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Fri, 06 May 2022 08:38:24 GMT

Ok sure, Thank you..

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

ovrebekk — Fri, 06 May 2022 08:20:34 GMT

You can use the SAADC to read any analog value, yes, but make sure to read the documentation link I shared earlier to see that the SAADC specifications satisfy your requirements.

I will summarize some of the key specifications here:

- 12-bit maximum resolution

- 200 ksps maximum sampling rate

- You can not use any GPIO pin for the ADC, only those 8 that are labeled AIN0-AIN7

- The voltage has to be in the range of 0-VDD, you can not sample values below 0V or values above VDD

Best regards
Torbjørn

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Thu, 05 May 2022 11:38:58 GMT

Hi,

Thanks for the reply.

This Internal ADC SAADC program is useful for reading any type of sensor value. Is it possible right

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

ovrebekk — Thu, 05 May 2022 11:23:32 GMT

The nRF52840 has an internal ADC module, called SAADC and documented here.

One of my colleagues made a small sample showing how to use the internal ADC in the nRF9160 using the standard Zephyr ADC driver, and you should be able to do it in a similar way on the nRF52840:
https://github.com/Rallare/fw-nrfconnect-nrf/tree/nrf9160_samples/samples/nrf9160/adc

Best regards
Torbjørn

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Wed, 04 May 2022 04:00:46 GMT

HI,

Thanks for the reply.

Internal ADC means?

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

ovrebekk — Tue, 03 May 2022 13:36:31 GMT

Would it be sufficient with a sample using the internal ADC of the nRF52840, or it has to be the ADS1118?

Best regards
Torbjørn

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Mon, 02 May 2022 11:22:51 GMT

Hello Ovrebekk,

Thanks for your reply. I need to read some sensor data through ADC concepts with NRF52840, Can you please provide some sample code, then it will helpful for me.

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

ovrebekk — Mon, 02 May 2022 11:00:22 GMT

Sorry for the slow response. Håkon is currently unavailable, and I will help out in the mean time.

There is no driver for the ADS1118 in either the nRF5 SDK or the nRF Connect SDK unfortunately, so you would need to implement this directly using the SPIM (spi master) driver.

Fortunately the ADS1118 is a relatively simple sensor to interface, there is not a lot of different commands you need to send.

A member of the community provided quite a lot of advice on interfacing the ADS1118 to an nRF device here, I would suggest you start by reading through that.

Best regards
Torbjørn

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Sat, 23 Apr 2022 10:29:05 GMT

I am waiting for your reply.

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

namitha K M — Fri, 22 Apr 2022 11:52:35 GMT

Hi,

Thanks for replying soon.

** Not only pressure, any sensor data i need to read.

** Yes i am going to use the ADS1118 ADC

** Yes I am planning to sample some analog pressure sensor with external ADC or Internal ADC from NRF52840.

** Yes I am using NRF SDK only.

RE: Need Sample ADC Program for (ADS1118) with NRF Dongle

helsing — Fri, 22 Apr 2022 11:12:21 GMT

Hello,

Please allow me to understand what you would like to achieve:

Which pressure sensor are you using?
Are you planning to operate the ADS1118 ADC from nRF52840?
Or are you planning to sample some analog pressure sensor by using the internal ADC from nRF52840?
Will you be using nRF5 SDK or have you considered moving to nRF Connect SDK?

Best regards,

Håkon