{"product_id":"custom-enhanced-series-hmi-optional-io-expansion-board-experimental-board","title":"Custom Enhanced series HMI optional IO expansion board experimental board","description":"\u003cp\u003e1. The IO expansion board belongs to the enhanced series HMI optional kit and is not standard, so it needs to be purchased separately. Please be aware!\r\n\u003c\/p\u003e\u003cp\u003e2. Only enhanced and above series support extended IO, while basic models do not support extended IO.\r\n\u003c\/p\u003e\u003cp\u003e3. Please refer to the enhanced sample project directory in the standard documentation package for application cases and schematic materials of the expansion board.\u003c\/p\u003e\u003cbr\u003e\u003cimg width=\"750\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/Sea1f44a684ac43e3a72c85c2c0e38a15O.png\" slate-data-type=\"image\"\u003e\u003cimg width=\"750\" height=\"auto\" src=\"https:\/\/ae01.alicdn.com\/kf\/Se7b5624061f5472a99ff8359fde37aadC.png\" slate-data-type=\"image\"\u003e\u003cp\u003e1. The 6 buttons on the interface respectively bind the 6 buttons on the expansion board\r\n\u003c\/p\u003e\u003cp\u003e2. The left and right keys control the volume of the buzzer, and the up and down keys control the brightness of the LED\r\n\u003c\/p\u003e\u003cp\u003e3. The control of the buzzer and LED is achieved by setting the PWM duty cycle\r\n\u003c\/p\u003e\u003cp\u003e4. This instance does not require the participation of a microcontroller\u003cbr\u003e\u003c\/p\u003e\r\n\u003cscript\u003ewindow.adminAccountId=2679243692;\u003c\/script\u003e\r\n","brand":"Lonten Tech","offers":[{"title":"Default Title","offer_id":44027194540227,"sku":"","price":1.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0659\/3416\/4163\/files\/Enhanced-series-HMI-optional-IO-expansion-board-experimental-board.webp?v=1729860666","url":"https:\/\/lontentechnology.com\/products\/custom-enhanced-series-hmi-optional-io-expansion-board-experimental-board","provider":"Lonten Tech","version":"1.0","type":"link"}