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    Unable to make T-Display S3 work with LiPo battery

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    • F
      Fabryz last edited by

      Hello everyone,
      I am using my Lilygo T-Display S3 to make an halloween project.
      At the moment I'm just using the display to show something, and the device is powered by a powerbank via the USBC port. But I wanted to make the project smaller and portable.

      So I bought 4x LiPo Batteries with its own re-charger, I have charged up the batteries and connected each of them to the T-Display S3 with the JST port: it won't powerup, no battery is working with the device. What am I doing wrong?

      The LiPo batteries: https://www.amazon.it/dp/B087LTZW61?psc=1&ref=ppx_yo2ov_dt_b_product_details
      Specs: 3,7 V 1100 mAh with Micro JST 1.25

      The recharger: https://www.amazon.it/dp/B0BN3X7MX9?psc=1&ref=ppx_yo2ov_dt_b_product_details

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      • teastain2
        teastain2 last edited by teastain2

        Sounds like the ol' GPIO 15 must be turned on HIGH issue.
        This enables the display power and the circuit that uses and re-charges the battery.
        I made a support repository for new users here:
        https://github.com/teastainGit/LilyGO-T-display-S3-setup-and-examples
        My examples are the simplest possible sketches that use the display, TFT_eSPI and Serial.print functions, as a sort of tutorial.
        Hope this helps -Terry

        If you are not running one of my sketches, you should add:

        #define PIN_POWER_ON 15 // LCD and battery Power Enable
        #define PIN_LCD_BL 38 // BackLight enable pin (see Dimming.txt)

        just before the setup and then in setup add:
        pinMode(PIN_POWER_ON, OUTPUT); //triggers the LCD backlight
        pinMode(PIN_LCD_BL, OUTPUT); // BackLight enable pin

        digitalWrite(PIN_POWER_ON, HIGH);
        digitalWrite(PIN_LCD_BL, HIGH);

        F 1 Reply Last reply Reply Quote 1
        • F
          Fabryz @teastain2 last edited by

          @teastain2 Thank you! I will try when I get back home

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          • F
            Fabryz last edited by Fabryz

            I confirm that this has solved my issue and mark it on the title for the posterity, many thanks!

            edit: apparently titles cannot be edited after a while, if a moderator could add "[SOLVED]" to this thread's title, it would be helpful for others 🙂

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            • S
              Swerwe123 last edited by

              Thank you so much for solving the problem with this topic. I was looking for it and got solution from it. Thanks

              teastain2 1 Reply Last reply Reply Quote 1
              • teastain2
                teastain2 @Swerwe123 last edited by

                @swerwe123 I solved it with @RobLatour 's help. Glad to hear it helped!

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