billtodd Posted November 30, 2021 Share Posted November 30, 2021 I'm building a segmented heated bed for my printer (yes, I pinched the idea from Prusa ;-)) The bed will have nine segments (100x120 to give an approximate 300x360 bed) . The segments heaters will be controlled by a Raspberry-PI PICO based DIY controller. I'd like to be able to control the temperature and selection of segments from my BTT TFT 35 (Great device BTW :-)) either directly or via my BTT octopus board . To do this I need to be able to route the temperature data to and from a spare serial port . Any guides or ideas how I might achieve this? Ideally I'd like to add a bed control page to the TFT menu which would allow selection of which segments are , or are not, heated and their current temperature . I realise this might require firmware mods and while I'm no expert at C++ , with guidance, I may be able to code it . Thoughts and suggestions welcome TIA Bill Quote Link to comment Share on other sites More sharing options...
BTT Tony Posted December 1, 2021 Share Posted December 1, 2021 Hi, I'm sorry, we have not tested this feature yet, and we are not sure whether it can be implemented. You can refer to our display firmware. https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware Quote Link to comment Share on other sites More sharing options...
billtodd Posted December 1, 2021 Author Share Posted December 1, 2021 Hi Tony, Thanks for the reply. The only way I can see to do this ATM, is to intercept the data between the TFT and Octopus , filtering for M155 reports from the Octopus , and feeding actual bed temperature back to TFT . Of course, this will not work in Marlin mode , but I don't use that anyway. Thoughts ? Bill Quote Link to comment Share on other sites More sharing options...
BTT Tony Posted December 3, 2021 Share Posted December 3, 2021 Hi, sorry, the touch mode of the display currently does not support the display of two hot beds, which is difficult to achieve. Quote Link to comment Share on other sites More sharing options...
billtodd Posted December 4, 2021 Author Share Posted December 4, 2021 Hi Tony, Yes i realise adding menus etc. to the display is beyond BTT's technical support , but my intention here ATM is just to intercept the temperature setting data , so I can control the new bed , and insert my temperature data in to the M155 reports for the TFT to display on the existing menu. Quote Link to comment Share on other sites More sharing options...
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