ESP8266 Community Forum

- Wed Feb 04, 2015 5:04 pm #8988 thank you for your explanation.

ESP8266.com Moderator
Lets get the party started and +1

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I like ESP8266 and ESP8285 and ESP32

- Fri Sep 25, 2015 2:18 pm #29870 Any chance to see a diagram of how it should be hooked up. I don't seem to understand how to deal between 3.3V and 5V.

All I need to have this working is one 3.3V GPIO -> level shifter -> and a 5kΩ (or 1k I saw both values mentioned) resistor between echo and trigger ?

- Thu Oct 27, 2016 5:35 pm #57246 So, just checking...does your code work on the ESP8266 in single pin mode?

- Tue Nov 01, 2016 1:09 am #57479 Hi there I'm also interested in this. I've found two articles with two approaches, https://sheldondwill.wordpress.com/2014/02/04/using-an-ultrasonic-sensor-hc-sr04-with-a-3-3v-micro-controller-tiva-c-series/ Using a 1K on the echo pin (although the diagram show the trigger pin)

and

https://sheldondwill.wordpress.com/2014/02/04/using-an-ultrasonic-sensor-hc-sr04-with-a-3-3v-micro-controller-tiva-c-series/

This has 2K2 and 4K7 on the echo pin