Not able to wake ESP32 from deepsleep with modem or PMU

[d0ct0rd-dalimo]

Hi there!

In schematic, I see the issue of not being able to use both PMU and GPRS modem as wake-up sources due to schematic specialties. When RI is active, modem pulls it down, the same thing for PMU Here is the schematic of RI level converter: For PMU, only delimiting resistor: For PMU, only pull-up:

Both of them are connected to pins 33 and 35 respectively, which supports ext1 wake up in ESP32. EXT1 in ESP32 supports only 2 wake-up modes:

• ANY_HIGH
• ALL_LOW

Solution for design change: add inverters before ESP32 pins

Workarounds for current design:

1. Use PMU and modem as different wake-up sources, configure bitmask for one of sources, set ext1 for ALL_LOW, another wake-up source set to ext0.
   • doesn't increase power consumption
   • for another external wake-up sources design will be hardly constraint
2. Periodically or constantly, poll wake-up sources with ULP
   • enables to use another external wake-up sources
   • increases power consumption
   • the risk to miss wake-up signal

[LilyGO]

Thank you for your offer. Solution for Design Change : But adding triodes to esp32 pins also increases sleep power consumption.