Backlight Doesn't Change

[scs-ben]

I am building a flashlight app and the backlight is either on or off. I am setting the intensity from 10-100 via button presses.
The backlight at full intensity is significantly less bright than my Garmin 255 (which has a similar MIP screen).

case CustomMessage::SET_BRIGHTNESS: {
    auto* req = static_cast<CustomMessage::SetBrightness*>(msg);
    LOG_INFO("Setting brightness to %u\n", req->brightness);
    auto *backlightMsg = mKernel.comm.allocateMessage<SDK::Message::RequestBacklightSet>();
    if (backlightMsg) {
        backlightMsg->brightness = req->brightness;
        backlightMsg->autoOffTimeoutMs = 300000;
        if (mKernel.comm.sendMessage(backlightMsg, 100)) {
            LOG_INFO("RequestBacklightSet sent successfully\n");
        } else {
            LOG_ERROR("Failed to send RequestBacklightSet\n");
        }
        mKernel.comm.releaseMessage(backlightMsg);
    }
} break;

[michaeldeaton]

had a look at the SDK source, your code looks fine.. RequestBacklightSet does carry the brightness field, but the interface that actually drives the backlight (libs/header/sdk/interfaces/ibacklight.hpp) only exposes on(timeout), off() and isOn(). There's no brightness path below the message layer, so anything from 1-100 can only ever come out as "on".

una-sdk/Libs/Header/SDK/Messages/CommandMessages.hpp

Lines 341 to 350 in 72d97af

	struct RequestBacklightSet : public MessageBase {
	uint8_t brightness; // 0-100%, 0 = off
	uint32_t autoOffTimeoutMs; // Auto-off timeout, 0 = disabled
	RequestBacklightSet()
	: MessageBase(MessageType::REQUEST_BACKLIGHT_SET)
	, brightness(100)
	, autoOffTimeoutMs(0)
	{}
	};

https://github.com/UNAWatch/una-sdk/blob/72d97afec98662012ac7009a214efa01d012b160/Libs/Header/SDK/Interfaces/IBacklight.hpp

[scs-ben]

@michaeldeaton that describes what I'm experiencing. Although the incredibly dim backlight on the UNA is an issue if is actually at 100% when it's on

[michaeldeaton]

Yeah, it does appear very dim - but i don't have anything to compare it to! Wish i had access to the firmware :)