The T-Watch’s power management is handled by the AXP202 power management IC, which controls power rails for the display, sensors, and other peripherals. Before any other subsystem can work reliably, the AXP202 must be properly initialized.
Implementation Guidance
– Use the AXP20X.h library to communicate with the AXP202
– Establish I2C communication with the AXP202 before attempting any power configuration
– Identify which power rails need to be enabled by reviewing the T-Watch schematic
– Enable the appropriate LDOs (low-dropout regulators) needed to power the display and other peripherals
– Review the AXP20X library examples for reference on typical initialization sequences
