Putting the LCD on "off" with ST7735_DISPOFF and the controller in sleep thanks to ST7735_SLPIN does not change power consumption. Putting SH200Q to sleep does not help neither so their power supply should be correctly shut down by the AXP192.
So we really need help from @m5stack here: did you measure the off/sleep power consumption of the board. Which values do you get ?
Thank you
So here are my measurements. I replaced the battery by an OTII tool, range 1uA - 5A
Power Off (long press on power switch): 1.92 mA
esp deep sleep (wifi/bt/adc): 8.37 mA
LDO2/EXTEN off: 6.68 mA
DC-DC1, OLED_VPP, 5V V_Ext: 2.43 mA
Disable battery charge: 2.44 mA
Diable Coulomb meter: 2.44 mA
Bias: register 35h: 200 uA for charging RTC which is not disabled
So there is obviously something consuming more power than it should. @m5stack , did you measure power consumption ? I am surprised that we have 1.92 mA in "AXP 192 power off state".
There is also 0.5 mA from something activated after AXP.Begin() as the power consumption stays at 2.44 mA instead of 1.92 mA. It is not the esp32 as I measure a consumption of 4.5 uA with the same sleep code with an esp32 dev board.
Here is the code I used:
uint8_t AXP192::SetSleep2(uint8_t reg)
// Disable LDO2 (OLED_VDD) and EXTEN (?)
// Those 2 bits seems to be a copy of 0x12. To be tested
buf = readI2C8(0x10);
buf &= 0b11111010;
writeI2C8(0x10, buf);
// Reset ADC to default state.
// Test to set 0x00 ?
writeI2C8(0x82, 0x83);
// Disable DC-DC1, OLED_VDD, 5B V_EXT
// DC-DC2 and EXTEN should already be disabled
writeI2C8(0x12, 0x00);
// Disable charge
buf = readI2C8(0x10);
buf &= 0b01111111;
writeI2C8(0x33, buf);
// Disable Coulomb meter
writeI2C8(0xB8, 0x00);
// // Disable ADC GPIO0
buf = readI2C8(0x90);
buf |= 0b00000111;
writeI2C8(0x90, buf);
// Sleep bit
buf = readI2C8(0x31);
buf = (1 << 3) | buf;
writeI2C8(0x31, buf);
}
uint8_t AXP192::readI2C8(uint8_t reg)
{
Wire1.beginTransmission(0x34);
Wire1.write(reg);
Wire1.endTransmission();
Wire1.requestFrom(0x34, 1);
return Wire1.read();
}
void AXP192::writeI2C8(uint8_t reg, uint8_t data)
{
Wire1.beginTransmission(0x34);
Wire1.write(reg);
Wire1.write(data);
Wire1.endTransmission();
}
void myDeepSleep(gpio_num_t PIN)
{
// Rewrite M5.Axp.DeepSleep() in order to enable ext0 wakep up.
esp_sleep_enable_ext0_wakeup(PIN, LOW);
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_AUTO);
esp_wifi_stop();
adc_power_off();
M5.Axp.SetSleep2();
esp_deep_sleep_start();
}
@morris45 there is some ways to improve it down to 2.44 mAh thanks to software improvements: https://community.m5stack.com/post/4949
But there is an issue with the device and even when "powering off the "board" thanks to the AXP192 there is still 1.92 mAh consumed :'(
Putting the LCD on "off" with ST7735_DISPOFF and the controller in sleep thanks to ST7735_SLPIN does not change power consumption. Putting SH200Q to sleep does not help neither so their power supply should be correctly shut down by the AXP192.
So we really need help from @m5stack here: did you measure the off/sleep power consumption of the board. Which values do you get ?
Thank you
Sure it would. @heybin what is the status ? They have been promised on Twitter too but still not published.
Thank you !
Hi, you can find the datasheet here. It is in Chinese but Google translate does a pretty decent job so we can understand almost everything.
You can also have a look a register 36h where you can modify long/short press times. Be careful, this button is used to power-on/off the device
@lukasmaximus : I agree with @ws1088 . Battery fully charged, long press on power switch to switch off the M5StickC should not drain battery in 5 hours.
I measured a consumption of 1.92 mA when off, which is too high :(
See measurements: http://community.m5stack.com/topic/1162/getting-longer-battery-run-time/5
So here are my measurements. I replaced the battery by an OTII tool, range 1uA - 5A
Power Off (long press on power switch): 1.92 mA
esp deep sleep (wifi/bt/adc): 8.37 mA
LDO2/EXTEN off: 6.68 mA
DC-DC1, OLED_VPP, 5V V_Ext: 2.43 mA
Disable battery charge: 2.44 mA
Diable Coulomb meter: 2.44 mA
Bias: register 35h: 200 uA for charging RTC which is not disabled
So there is obviously something consuming more power than it should. @m5stack , did you measure power consumption ? I am surprised that we have 1.92 mA in "AXP 192 power off state".
There is also 0.5 mA from something activated after AXP.Begin() as the power consumption stays at 2.44 mA instead of 1.92 mA. It is not the esp32 as I measure a consumption of 4.5 uA with the same sleep code with an esp32 dev board.
Here is the code I used:
uint8_t AXP192::SetSleep2(uint8_t reg)
// Disable LDO2 (OLED_VDD) and EXTEN (?)
// Those 2 bits seems to be a copy of 0x12. To be tested
buf = readI2C8(0x10);
buf &= 0b11111010;
writeI2C8(0x10, buf);
// Reset ADC to default state.
// Test to set 0x00 ?
writeI2C8(0x82, 0x83);
// Disable DC-DC1, OLED_VDD, 5B V_EXT
// DC-DC2 and EXTEN should already be disabled
writeI2C8(0x12, 0x00);
// Disable charge
buf = readI2C8(0x10);
buf &= 0b01111111;
writeI2C8(0x33, buf);
// Disable Coulomb meter
writeI2C8(0xB8, 0x00);
// // Disable ADC GPIO0
buf = readI2C8(0x90);
buf |= 0b00000111;
writeI2C8(0x90, buf);
// Sleep bit
buf = readI2C8(0x31);
buf = (1 << 3) | buf;
writeI2C8(0x31, buf);
}
uint8_t AXP192::readI2C8(uint8_t reg)
{
Wire1.beginTransmission(0x34);
Wire1.write(reg);
Wire1.endTransmission();
Wire1.requestFrom(0x34, 1);
return Wire1.read();
}
void AXP192::writeI2C8(uint8_t reg, uint8_t data)
{
Wire1.beginTransmission(0x34);
Wire1.write(reg);
Wire1.write(data);
Wire1.endTransmission();
}
void myDeepSleep(gpio_num_t PIN)
{
// Rewrite M5.Axp.DeepSleep() in order to enable ext0 wakep up.
esp_sleep_enable_ext0_wakeup(PIN, LOW);
esp_sleep_pd_config(ESP_PD_DOMAIN_RTC_PERIPH, ESP_PD_OPTION_AUTO);
esp_wifi_stop();
adc_power_off();
M5.Axp.SetSleep2();
esp_deep_sleep_start();
}
Other hints:
Switch off various IC on the boards by cutting their power supply. See here for the screen. M5 Stack committed to release at least power management part of the schematic, should help a lot.
M5StickC first batch had an issue and need a 680 Ohm resistor between G0 and 3.3 V, see here
I plan to de-solder the two boards tonight so I will be able to measure power consumption and see which settings works.