# \[APP\]\[Pro\] Modbus - Connect every Modbus devices **URL:** \ **Category:** Apps\ **Tags:** app, homey-pro, advancedflow\ **Created:** [February 20, 2024, 7:13pm UTC](https://community.homey.app/t/app-pro-modbus-connect-every-modbus-devices/104497 "2024-02-20T19:13:05Z")\ **Posts on this page:** 1\ **Showing post:** 441
**Author:** ![Johan\_Bruyn](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/johan_bruyn/32/132683_2.png) [@Johan\_Bruyn](https://community.homey.app/u/Johan_Bruyn)\ **Post date:** [April 5, 2025, 7:34pm UTC](https://community.homey.app/t/app-pro-modbus-connect-every-modbus-devices/104497/441 "2025-04-05T19:34:01Z")
I would like to set the “power limit” setting of my Solis 4G mini inverter via Homey. (avoid negative in feed tariff) But when it comes to Modbus I don’t know what I’m doing so I need some help. > **[Solis S2-WL-ST MODBUS TCP Communicatie](https://solis-service.solisinverters.com/nl/support/solutions/articles/44002530087-solis-s2-wl-st-modbus-tcp-communicatie)** > > If you wish to download this article as a PDF, please scroll to the bottom of the page or click HERE.  Share this article: Share via Email Solis S2-WL-ST MODBUS TCP Communicatie (dit artikel wordt momenteel vertaald en kan (deel... I made a Modbus device. IP set to the address of the dongle. Port 502 ID 1 connection type single connect. Homey says everything is fine. But how to make the flow to read the current setting? And how to put a new setting in? I understand that I have to use registers. I found a document on the site below. Then I think it is register 3050 (page 12) 3050 Power limit actual U16 1% 10000\<–\>100% 3X But the document also writes 5.3 Register address of inverter operation information. The function code is 0x04, the register address needs to offset one bit. Example: register address: 3000, the send address is 2999. > **[loxone-library](https://library.loxone.com/detail/ginlong-solis-4g-inverter-1239/overview)** If anyone can make an example of the read and write flow I would be grateful. --- _[View the full topic](https://community.homey.app/t/app-pro-modbus-connect-every-modbus-devices/104497)._