RX TX and RTS CTS - how to connect with the RN52 Bluetooth Module

Projects General Guidance
1

Hi all,

Santa got me some confusing toys this year! An Arduino Mega 2560 (which I'm learning the ropes on) and an RN-52 Bluetooth module (RN-52 Bluetooth Hookup Guide - SparkFun Learn). My question is likely straight forward however being new, I am slightly confused on how to handle it.

My goal: stream tunes (completed successfully) and be able to answer/end an incoming phone call (this is where I am stuck). I have found enough information regarding the UART RTS/CTS/TX/RX pins on the module to understand that I need to use them to communicate with the RN52 however I'm at a loss on what to do with them. I was able to connect to the RN52 with my computer and through CoolTerm I was able to answer a call, end a call, make a call, etc. But obviously that defeats the purpose of Bluetooth!

My question: How/Where would I connect this to the Mega 2560? And once connected, how can I send the RN52 commands like C for answering a call. Or would one just program the RN52 and forget the GIOP's on the RN52 (is that even possible?)?

Here is the RN52 manual if needed: https://dlnmh9ip6v2uc.cloudfront.net/assets/a/2/a/a/d/5217c61f757b7f55758b456f.pdf

Any help in the right direction would be much appreciated. If more information is needed from me like what I currently have configured, let me know. I don't mind reading and learning how, I'm just stuck!

Thank you in advance! Happy New Year!

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Upon further searching I located some useful information about how to connect the RX pins on each device.

Bluetooth Arduino
TX --> RX(0)
RX --> TX(1)

And apparently using the standard Serial(Serial - Arduino Reference) you can communicate with the Bluetooth (this is where I believe I messed up by not using it). I will be trying this later. I will also keep this post updated as I come to resolution to help those in the future reading it. And of course, if you have input, please let me know!! Thanks :slight_smile:

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Hi ben90036,

Were you able to establish communication between Arduino and RN52? If yes, could you please provide details about RN52 configuration, your Arduino code and the physical connections? Thanks in advance for your help.