Here is how to develop a "System-Level Feature" for an RK322x Android 7.1 box.
Hardware. Chipset. CPU. 4x 1.2-1.5 GHz ARM Cortex-A7. GPU. Mali-400 MP2. Display. HDMI (up to 1920x1080, 4K possible?), Composite. postmarketOS Wiki RK322X Box Firmware 7.1.2 Details | PDF - Scribd android rk322x box rk322x box 7.1 2 nhg47k firmware download
If your device is bootlooping, experiencing software crashes, or you simply want to restore it to a clean state, flashing the official or compatible firmware is the best solution. Here is how to develop a "System-Level Feature"
Flashing firmware carries a risk of permanently bricking your device if done incorrectly. Before searching for a download link, verify the following details: experiencing software crashes
Open your TV box and check the (e.g., RK3229_D4_V2.0 , MX4N , R29 ). Firmware is board-specific.