MetaMotion R Firmware update

fryjs

Attempting to update firmware with swift sdk, but getting the error:
"Could not perform DFU. Firmware 0.2.2 requires bootloader version \'0.2.1\' which does not exist."

MetaMotion is on 1.4.2 firmware, 0.3 hardware

Eric

• What version are you trying to update to?
• Can the iOS MetaBase app update the firmware?

fryjs

I'm not specifying the build to update to, so it should be the latest (1.4.4). Metabase can update the firmware

fryjs

Metabase on iOS successfully updates the firmware yes. In my app I:

• connect to 5 metawear devices
• call metawear.checkForFirmwareUpdate() on all of them which returns FirmwareBuild values indicating new firmware versions are available, which is correct (the devices are on 1.4.2)
• select a single device to update the firmware of (the others are still connected but not doing anything)
• call metawear.updateFirmware(delegate: self, build: nil) which gives the error

I've tried with a single device connected also, but the result is the same (as expected)

fryjs

umm, a fix for the swift sdk or am I doing something incorrect?

Eric

Can you post a simple swift function calling the firmware functions that result in the error?

fryjs

After some more investigating it seems modifying the connection parameters causes it to fail:
This works:

MetaWearScanner.shared.startScan(allowDuplicates: false) { metawear in         
    if self.metawear == nil {
        self.metawear = metawear
        MetaWearScanner.shared.stopScan()

        //connect
        metawear.connectAndSetup().continueOnSuccessWith { _ in
            metawear.flashLED(color: UIColor.white, intensity: 1, _repeat: 255, onTime: 1000, period: 2000)
            mbl_mw_settings_set_tx_power(metawear.board, 4)

        //read battery
        }.continueOnSuccessWithTask {
            return mbl_mw_settings_get_battery_state_data_signal(metawear.board).read()

        //abort if battery < 50, otherwise check for firmware update
        }.continueOnSuccessWithTask { batteryData -> Task<FirmwareBuild?> in
            let mblBatteryState = batteryData.valueAs() as MblMwBatteryState
            print ("Battery charge: \(mblBatteryState.charge)")

            guard mblBatteryState.charge >= 50 else { return Task<FirmwareBuild?>(error: MetaWearError.operationFailed(message: "Battery must have at least 50% charge"))  }

            return metawear.checkForFirmwareUpdate()

        //update firmware
        }.continueOnSuccessWithTask { firmwareBuild in
            print (firmwareBuild?.firmwareRev ?? "Firmware is already the latest version")
            return firmwareBuild == nil ? Task<()>(()) : metawear.updateFirmware(delegate: self, build: nil)

        //results
        }.continueOnSuccessWith {
            print ("success")

        }.continueOnErrorWith {error in
            print (error)

        }
    }
}

This doesn't:

MetaWearScanner.shared.startScan(allowDuplicates: false) { metawear in       
    if self.metawear == nil {
        MetaWearScanner.shared.stopScan()
        self.metawear = metawear

        //connect
        metawear.connectAndSetup().continueOnSuccessWith { _ in
            metawear.flashLED(color: UIColor.white, intensity: 1, _repeat: 255, onTime: 1000, period: 2000)
            mbl_mw_settings_set_tx_power(metawear.board, 4)
            mbl_mw_settings_set_connection_parameters(metawear.board, 15, 15, 0, 6000)

        //read battery
        }.continueOnSuccessWithTask {
            return mbl_mw_settings_get_battery_state_data_signal(metawear.board).read()

        //abort if battery < 50, otherwise check for firmware update
        }.continueOnSuccessWithTask { batteryData -> Task<FirmwareBuild?> in
            let mblBatteryState = batteryData.valueAs() as MblMwBatteryState
            print ("Battery charge: \(mblBatteryState.charge)")

            guard mblBatteryState.charge >= 50 else { return Task<FirmwareBuild?>(error: MetaWearError.operationFailed(message: "Battery must have at least 50% charge"))  }

            return metawear.checkForFirmwareUpdate()

        //update firmware
        }.continueOnSuccessWithTask { firmwareBuild in
            print (firmwareBuild?.firmwareRev ?? "Firmware is already the latest version")
            return firmwareBuild == nil ? Task<()>(()) : metawear.updateFirmware(delegate: self, build: nil)

        //results
        }.continueOnSuccessWith {
            print ("success")

        }.continueOnErrorWith {error in
            print (error)

        }
    }
}

I can happily live with that, but it seems a strange error to get for that mis-configuration

Eric

I agree the behavior is odd, but there is no reason to adjust the connection interval prior to perform the firmware update.