# Octave ORP vs mangOH yellow - which physical UART to use **URL:** \ **Category:** Octave\ **Created:** [December 12, 2019, 12:03pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667 "2019-12-12T12:03:14Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![johnofleek](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/johnofleek/32/4726_2.png) [@johnofleek](https://forum.sierrawireless.com/u/johnofleek)\ **Post date:** [December 12, 2019, 12:03pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/1 "2019-12-12T12:03:14Z")
Which MangOH yellow physical pins relate to Octave ORP UART1 and UART2 ? ![ORP](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/1/1aca3dc429048b3630f8474835f62254343f2ae7.png) I built the table below from info in [mangOH yellow](http://mangoh.io/uploaded-documents/Reference/mangOH%20Yellow/Discover/HW%20Reference%20Manual/41113116%20mangOH%20Yellow%20HW%20Guide%20-%20HTML5-Responsive%20HTML5/#t=41113116_mangOH_Yellow_HW_Guide_-_HTML5%2FHardware%2FHardware.htm) Is this correct? | ORP Port Name | Connection | | Voltage | | --- | --- | --- | --- | | UART 1 | Expansion Connector (CN805) | Pins 7-8 | 3V3 ? | | UART 1 | IoT Connector (CN601) | Pins 12–15 | 1V8 ? | | UART 2 | micro-USB (CN800) | | USB | Also is any configuration needed to enable UART 1 and UART 2 for Octave ORP use? e.g. AT commands Cheers John ---
**Author:** ![jvermillard](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jvermillard/32/4626_2.png) [@jvermillard](https://forum.sierrawireless.com/u/jvermillard)\ **Post date:** [December 12, 2019, 2:36pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/2 "2019-12-12T14:36:25Z")
Hi John, First does in your device detail page, the reported model is “mangoh yellow” or"unknown", if unknown you need a more recent yellow firmware ---
**Author:** ![jvermillard](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jvermillard/32/4626_2.png) [@jvermillard](https://forum.sierrawireless.com/u/jvermillard)\ **Post date:** [December 12, 2019, 2:47pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/3 "2019-12-12T14:47:49Z")
Anyway, it will work only on UART1 and no MAPUART command are needed, it will be done for you > [@johnofleek](#): > > |UART 1|Expansion Connector (CN805)|Pins 7-8|3V3 ?| > |UART 1|IoT Connector (CN601)|Pins 12–15|1V8 ?| ---
**Author:** ![johnofleek](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/johnofleek/32/4726_2.png) [@johnofleek](https://forum.sierrawireless.com/u/johnofleek)\ **Post date:** [December 12, 2019, 3:04pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/4 "2019-12-12T15:04:53Z")
Thanks Julien I guess the screen grab below means I have an older Legato system image? ![DeviceDetail](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/d/d76a2a9e48b3edc2a7e8cb1a7102b6a86011094c.png) Which of the two versions should I use? ![FirmwareUpdate](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/d/d6cff37b030d92d92d505d2fe38bfa54fcdee8b2.png) Are there any change notes for the upgrades? Does the upgrade erase edge javascript in the device? I noticed in a [post](https://forum.sierrawireless.com/t/wp77xx-how-to-revert-firmware-version-back-to-factory-release-version/18625/5) by Thibault that there is a mangOH Yellow Software Image release available [mangOH Yellow Software Image](https://mangoh.io/mangoh-yellow-resources-software). There doesn’t appear to be any version information available on the page or an indication that the .spk image supports Octave - is this image suitable for use with mangOH + Octave + WP7702 ? Which Octave version is this image? The image file name is this ```auto yellow_wp77xx_0.3.0.spk ``` Cheers John ---
**Author:** ![Senso](https://avatars.discourse-cdn.com/v4/letter/s/8e7dd6/32.png) [@Senso](https://forum.sierrawireless.com/u/Senso)\ **Post date:** [December 13, 2019, 11:33pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/5 "2019-12-13T23:33:56Z")
Hi @johnofleek I accidentally upgraded to version 2.1.0 and regretted it as it does not support the out the box functionality that newbies like me needed. After a long struggle I rolled back to version 1.0 using yellow\_wp77xx\_0.3.0.spk. The model name in mine shows as “MangOH Yellow” ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/7/7cf74076dfd09266ecb739385859d10506f8148c.png) ---
**Author:** ![dla](https://avatars.discourse-cdn.com/v4/letter/d/4491bb/32.png) [@dla](https://forum.sierrawireless.com/u/dla)\ **Post date:** [March 21, 2020, 8:51am UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/6 "2020-03-21T08:51:16Z")
You can get the steps to do a fresh install of your Yellow for Octave here: [https://docs.octave.dev/docs/getting-started-with-the-mangoh-yellow](https://docs.octave.dev/docs/getting-started-with-the-mangoh-yellow) Latest Yellow firmware for Octave also available here: [https://mangoh.io/mangoh-yellow-resources-software](https://mangoh.io/mangoh-yellow-resources-software) ---
**Author:** ![johnofleek](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/johnofleek/32/4726_2.png) [@johnofleek](https://forum.sierrawireless.com/u/johnofleek)\ **Post date:** [March 26, 2020, 2:57pm UTC](https://forum.sierrawireless.com/t/octave-orp-vs-mangoh-yellow-which-physical-uart-to-use/18667/7 "2020-03-26T14:57:39Z")
The answer is (at the moment) UART1 is supported by Octave Edge ORP On the mangOH yellow you can use either | ORP Port Name | Connection | | Voltage | | --- | --- | --- | --- | | UART 1 | Expansion Connector (CN805) | Pins 7-8 | 3V3 | | UART 1 | IoT Connector (CN601) | Pins 12–15 | 1V8 | But be very careful with CN805 as the level shifter used is a Fairchild / ON FXMA108 - this part is only compatible with insulated gate logic i.e MOS. If you connect anything which sinks or sources current the circuit may malfunction. From the datasheet ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/1/14ebc8663873b16646902c600fb854365f738b7a.png)