# Send command to MPPT Solar charger on VE.DIRECT

**URL:** <https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439>\
**Category:** General\
**Created:** [4 September 2020 11:40 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439 "2020-09-04T11:40:30Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![panmanjon](https://avatars.discourse-cdn.com/v4/letter/p/dfb087/32.png) [@panmanjon](https://discourse.nodered.org/u/panmanjon)\
**Post date:** [4 September 2020 11:40 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439/1 "2020-09-04T11:40:31Z")

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I am having some problems using the node-red inject node to turn no/off my Blue Solar mppt 150/70 - tr - it all worked fine with can bus and mod bus through the venus gx but am trying to control direct from the raspberry pi node-red flow. My problem is getting the correct payload message to inject up the serial link - From the VE.DIRECT Protocol Blue and smart solar MPPT Chargers document (quite difficult for me to understand) I can see that register 0x0202 bit 1 needs to be set to 1 to enable remote control and register 0x0200 needs to be 4 for off and 1 for on - I just need to know the payload type and exact messages please - many thanks in advance

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**Author:** ![panmanjon](https://avatars.discourse-cdn.com/v4/letter/p/dfb087/32.png) [@panmanjon](https://discourse.nodered.org/u/panmanjon)\
**Post date:** [8 September 2020 14:56 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439/2 "2020-09-08T14:56:46Z")

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I have now bee able to turn the solar charger off on the ve.direct serial link  
the inject string is ["0x3A","0x38","0x30","0x30","0x30","0x32","0x30","0x30","0x30","0x34","0x34","0x37","0x0A"]  
still having a problem workin out the string for register 202 to enable remote control and the solar turn on string so some help would be appreciated please - thanks

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**Author:** ![panmanjon](https://avatars.discourse-cdn.com/v4/letter/p/dfb087/32.png) [@panmanjon](https://discourse.nodered.org/u/panmanjon)\
**Post date:** [9 October 2020 09:55 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439/3 "2020-10-09T09:55:37Z")

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All solved now thanks

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**Author:** ![freds](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/freds/32/43247_2.png) [@freds](https://discourse.nodered.org/u/freds)\
**Post date:** [11 October 2020 01:49 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439/4 "2020-10-11T01:49:13Z")

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Glad to hear that you solved it.

Another approach is to load Venus GX software onto a raspberry Pi and then use the node red library for Victron to control your installation. Run the same software as they have on the $500.00 CCGX...

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**Author:** ![panmanjon](https://avatars.discourse-cdn.com/v4/letter/p/dfb087/32.png) [@panmanjon](https://discourse.nodered.org/u/panmanjon)\
**Post date:** [13 October 2020 11:44 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439/5 "2020-10-13T11:44:06Z")

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Thanks Freds - thought about that initially but decided to stick with what I knew. I have 3 non victron products on the same flow and had already got all that working as well as ve.direct with 2 different victron chargers and a venus along with a battery on a can bus to the raspi via modbus. . Just about got it working on a new project with just a battery and victron charger with the raspi running node-red - now experimenting which is the best raspi to use along with node-red. Thanks again

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [12 December 2020 11:44 UTC](https://discourse.nodered.org/t/send-command-to-mppt-solar-charger-on-ve-direct/32439/6 "2020-12-12T11:44:15Z")

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