Values are missing while reading SPI data

Projects Networking, Protocols, and Devices
1

Hii ,

I am working on interfacing of ATM90E36 with ESP32 using SPI. As of now interfacing was successfully carried out. However, while reading the data (only three phase voltage and frequency), some of data getting missed and showed zero.

Data as follows:
21:02:44.123 -> VA:249.04V
21:02:44.123 -> VB:249.60V
21:02:44.123 -> VC:249.36V
21:02:44.157 -> f49.90Hz
21:02:45.176 -> VA:249.16V
21:02:45.176 -> VB:249.72V
21:02:45.176 -> VC:249.48V
21:02:45.210 -> f49.90Hz
21:02:48.368 -> VA:249.26V
21:02:48.368 -> VB:249.82V
21:02:48.368 -> VC:249.58V
21:02:48.402 -> f49.90Hz
21:02:49.423 -> VA:249.28V
21:02:49.423 -> VB:249.85V
21:02:49.423 -> VC:249.61V
21:02:49.457 -> f49.91Hz
21:02:50.475 -> VA:249.26V
21:02:50.508 -> VB:249.82V
21:02:50.508 -> VC:249.58V
21:02:50.508 -> f49.91Hz
21:02:51.561 -> VA:249.16V
21:02:51.561 -> VB:249.72V
21:02:51.561 -> VC:249.48V
21:02:51.595 -> f49.91Hz
21:02:54.754 -> VA:249.12V
21:02:54.754 -> VB:249.69V
21:02:54.754 -> VC:195.56V
21:02:54.788 -> f0.00Hz (here frequency missed)
21:02:55.809 -> VA:249.03V
21:02:55.809 -> VB:0.00V (here voltage missed)
21:02:55.809 -> VC:0.00V (here voltage missed)
21:02:55.842 -> f49.91Hz
21:02:56.860 -> VA:249.03V
21:02:56.860 -> VB:249.59V
21:02:56.860 -> VC:249.35V
21:02:56.894 -> f0.00Hz (here Frequency missed)
21:02:56.860 -> VA:249.03V
21:02:56.860 -> VB:249.59V
21:02:56.860 -> VC:249.35V
21:02:56.894 -> f0.00Hz (here Frequency missed)
21:02:57.947 -> VA:0.00V (here voltage missed)
21:02:57.947 -> VB:19.03V (here voltage missed)
21:02:57.947 -> VC:0.00V (here voltage missed)
21:02:57.947 -> f0.00Hz (here Frequency missed)
21:02:58.999 -> VA:0.00V (here voltage missed)
21:02:58.999 -> VB:0.00V (here voltage missed)
21:02:58.999 -> VC:0.00V (here voltage missed)
21:02:59.033 -> f49.91Hz
21:03:00.052 -> VA:321.65V
21:03:00.052 -> VB:249.59V
21:03:00.052 -> VC:249.35V
21:03:00.086 -> f5.12Hz (here Frequency wrong )
21:03:01.106 -> VA:0.00V (here voltage missed)
21:03:01.106 -> VB:0.00V (here voltage missed)
21:03:01.140 -> VC:288.52V
21:03:01.140 -> f49.91Hz

and its repeating as cycle but most of time we are able to get the value but only some time it is missing.
Could you help me out to rectify this issue?

Thanks in Advance!

2

Post the connection diagram and the sketch along with a link to the data sheets of ATM90E36.

3

Dear Mostafa,

Thanks for your prompt action.

I am herewith attaching the link of Github page for your reference.

In this page you will get datasheet and all connection interface for ATM90E36 and ESP32.

However, I'm using SPI pins on ESP32 as follows for interface:

5-CS
18-CLK
19-MISO
23-MOSI

4

There are varieties of ESP32; can you please post a picture of the ESP32 that you are using?

5

Hii Mustafa

Please find the ESP32 attachment with pin diagram.

GPIO-pins-of-ESP32-DEVKIT.jpg
GPIO-pins-of-ESP32-DEVKIT.jpg750×538 96.7 KB