ESP8266 Community Forum

- Wed Jan 22, 2020 6:09 am #85345 hi,
the code is taken for testing from the doc in the below link :
https://wiki.dfrobot.com/A02YYUW%20Wate ... %20SEN0311

I have recently taken a A20yyuw ultrasonic sensor . I have been testing sensor by interfacing with esp8266 on the serial monitor its getting the "ERROR" readings, so i have print the values its getting the same value every time even when i have changed the direction of the sensor its not detecting and values is not varying .i have checked it by giving 5V also. Please help me by giving the suggestions.

thanks in advance

- Wed May 18, 2022 1:33 pm #94556 Hi,

Did you manage to get your sensor working ? I'm having the same issues :-/

Kr,

BArt

- Fri May 20, 2022 7:49 am #94571

hi,
the code is taken for testing from the doc in the below link :
https://wiki.dfrobot.com/A02YYUW%20Wate ... %20SEN0311

I have recently taken a A20yyuw ultrasonic sensor . I have been testing sensor by interfacing with esp8266 on the serial monitor its getting the "ERROR" readings, so i have print the values its getting the same value every time even when i have changed the direction of the sensor its not detecting and values is not varying .i have checked it by giving 5V also. Please help me by giving the suggestions.

thanks in advance

Your link didn't return a valid page from the site. Also your A20yyuw reference didn't bring up any hits on Google, so I can't advice you on that specific sensor. If it acts similar to the HC-SR04 may be your problem.

The HC-SR04 is a 5V sensor and has problems trying to work from the 3.3V logic that an ESP8266 uses.
The HC-SR04P is a 3.3V sensor and works flawlessly with the ESP8266.

I have seen a hack to modify a regular HC-SR04 to work with the 3.3V properly, but you'll need to do a Google search to find it.

Hope this helps.

3 lines of code = Complete IoT, App, Web Server
w/ GUI Admin Client, Drag & Drop File Manager, OTA Built-In, Access Point Manager,
Performance Metrics, Web Socket Comms, App API, All running on ESP8266...
Even usable on ESP-01S --- Please check it out!
https://inqonthat.com/inqportal-the-three-line-promise/
https://InqOnThat.com/inqportal

- Fri May 20, 2022 9:52 am #94578

Your link didn't return a valid page from the site.

FYI. It's a 2.5 year old post and I'm pretty sure OP will ever see your reply since we don't have email notifications on this forum.

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.