Specific AXP192 code to turn on all devices…
#include "axp20x.h
AXP20X_Class axp;
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.
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void setup() {
Wire.begin(21, 22);
if (!axp.begin(Wire, AXP192_SLAVE_ADDRESS)) {
Serial.println(“AXP192 Begin PASS”);
} else {
Serial.println(“AXP192 Begin FAIL”);
}
axp.setPowerOutPut(AXP192_LDO2, AXP202_ON);
axp.setPowerOutPut(AXP192_LDO3, AXP202_ON);
axp.setPowerOutPut(AXP192_DCDC2, AXP202_ON);
axp.setPowerOutPut(AXP192_EXTEN, AXP202_ON);
axp.setPowerOutPut(AXP192_DCDC1, AXP202_ON);
This should/will kick your GPS into life etc, works perfect for me.