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Fixed the issue where T-Echo did not completely shut down peripherals… #8524

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Fixed the issue where T-Echo did not completely shut down peripherals… #8524

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424c40e
Fixed the issue where T-Echo did not completely shut down peripherals…
lewisxhe Nov 3, 2025
321b0fb
Merge branch 'master' into master
thebentern Nov 4, 2025
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10 changes: 10 additions & 0 deletions src/platform/nrf52/main-nrf52.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -291,6 +291,16 @@ void cpuDeepSleep(uint32_t msecToWake)
if (Serial1) // A straightforward solution to the wake from deepsleep problem
Serial1.end();
#endif

#ifdef TTGO_T_ECHO
// To power off the T-Echo, the display must be set
// as an input pin; otherwise, there will be leakage current.
pinMode(PIN_EINK_CS, INPUT);
pinMode(PIN_EINK_DC, INPUT);
pinMode(PIN_EINK_RES, INPUT);
pinMode(PIN_EINK_BUSY, INPUT);
#endif

setBluetoothEnable(false);

#ifdef RAK4630
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3 changes: 1 addition & 2 deletions variants/nrf52840/t-echo/variant.h
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Expand Up @@ -181,7 +181,7 @@ External serial flash WP25R1635FZUIL0

#define PIN_GPS_STANDBY (32 + 2) // An output to wake GPS, low means allow sleep, high means force wake
// Seems to be missing on this new board
// #define PIN_GPS_PPS (32 + 4) // Pulse per second input from the GPS
#define PIN_GPS_PPS (32 + 4) // Pulse per second input from the GPS
#define GPS_TX_PIN (32 + 9) // This is for bits going TOWARDS the CPU
#define GPS_RX_PIN (32 + 8) // This is for bits going TOWARDS the GPS

Expand All @@ -203,7 +203,6 @@ External serial flash WP25R1635FZUIL0
#define PIN_SPI_MOSI (0 + 22)
#define PIN_SPI_SCK (0 + 19)

#define PIN_PWR_EN (0 + 6)

// To debug via the segger JLINK console rather than the CDC-ACM serial device
// #define USE_SEGGER
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