Attention?Avoid static electricity hitting the PCBA. Release the static electricity of hand before touching the PCBADo not allow the actual operating voltage of the GPIO to exceed the rated value, otherwise the PCBA will be permanently damagedPower off completely before plugging or removing itDuring the power-on, avoid any liquid or metal touching PCBA components?otherwise the PCBA will be damaged even burnSupport: support @ youyeetoo.comCommunication and customized consulting: even @ youyeetoo.comWhatsapp: +86 150 1406 1350Forum: forum.youyeetoo.com (Recommend)If you need support or bulk inquiries, please also contact me.