Skip to content

T114: Allow GPS to sleep, keep Vext active only when GPS is connected #924

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
wants to merge 1 commit into
base: dev
Choose a base branch
from
Open

T114: Allow GPS to sleep, keep Vext active only when GPS is connected #924

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 6 additions & 1 deletion variants/heltec_t114/target.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -63,8 +63,10 @@ bool T114SensorManager::begin() {
Serial1.begin(9600);

// Try to detect if GPS is physically connected to determine if we should expose the setting
pinMode(VEXT_EN, OUTPUT);
pinMode(GPS_EN, OUTPUT);
digitalWrite(GPS_EN, HIGH); // Power on GPS
digitalWrite(VEXT_EN, HIGH); // Power on GPS
digitalWrite(GPS_EN, HIGH); // GPS_EN is GPS_WAKEUP

// Give GPS a moment to power up and send data
delay(1500);
Expand All @@ -75,9 +77,12 @@ bool T114SensorManager::begin() {
if (gps_detected) {
MESH_DEBUG_PRINTLN("GPS detected");
digitalWrite(GPS_EN, LOW); // Power off GPS until the setting is changed
// Keep Vext active, otherwise GPS jumps back on...
} else {
MESH_DEBUG_PRINTLN("No GPS detected");
digitalWrite(GPS_EN, LOW);
// No GPS found, Vext not needed
digitalWrite(VEXT_EN, LOW);
}

return true;
Expand Down
8 changes: 7 additions & 1 deletion variants/heltec_t114/variant.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -115,8 +115,14 @@
////////////////////////////////////////////////////////////////////////////////
// GPS

#define GPS_EN (21)
#define VEXT_EN (21)

#define GPS_RESET (38)
#define GPS_WAKE_UP (34)
#define GPS_PPS (36)

// Send GPS to sleep, Vext off still has GPS active
#define GPS_EN GPS_WAKE_UP

////////////////////////////////////////////////////////////////////////////////
// TFT
Expand Down