Same problem. Dead Mooshimeter. New batteries. New phone – Samsung Express Prime running Android 6.0.1. Just downloaded the app. Upon connecting it told me there was a new update. I followed the steps. It said it was programming the device and the LED rapidly flashed. When done it rebooted. Now it won’t connect and says “Bootloader – Invalid firmware – Rssi: -37 dBm”. Multiple tries with the same result. I have tried removing the battery and resetting the device.
Up until this point I have been very pleased with the meter. However, if there is a problem with the update we should have been warned. I do not have an IOS phone. I now seem to have a $120.00 BRICK. I AM NOT A HAPPY CAMPER!!!
I hope someone can give me a solution soon.