# UART with HL7618

**URL:** <https://mangoh.discourse.group/t/uart-with-hl7618/652>\
**Category:** mangOH Green\
**Created:** [August 2, 2017, 10:28pm UTC](https://mangoh.discourse.group/t/uart-with-hl7618/652 "2017-08-02T22:28:54Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ajegan](https://avatars.discourse-cdn.com/v4/letter/a/df788c/32.png) [@ajegan](https://mangoh.discourse.group/u/ajegan)\
**Post date:** [August 2, 2017, 10:28pm UTC](https://mangoh.discourse.group/t/uart-with-hl7618/652/1 "2017-08-02T22:28:54Z")

</div>

My design is based on mangOH Green and I am using HL7618.  
I would like to use UART communication from the microcontroller to control the HL device.  
Does connecting the HL and micro using UART work directly?  
Is there any specific setting required?  
In the custom board, I have the access to UART Tx and Rx only.  
Also let me know, what is the initial test to understand the HL device is working.

Thanks  
AJ

---

<div class="post-metadata">

**Author:** ![ajegan](https://avatars.discourse-cdn.com/v4/letter/a/df788c/32.png) [@ajegan](https://mangoh.discourse.group/u/ajegan)\
**Post date:** [August 3, 2017, 3:06pm UTC](https://mangoh.discourse.group/t/uart-with-hl7618/652/2 "2017-08-03T15:06:11Z")

</div>

I found this line in the technical specification “Either UART1 or the USB interface could be used to send AT commands” (I believe both communications are available by default) for HL7618. So, now I am clear that, I can communicate with HL through UART1 port directly. But, does it support just 2 line communication without doing any configuration (+KSLEEP=2) update?

Thanks