Shipping mode issue impacting Tracker One v1.0 devices manufactured before August 31, 2020.
Issue Summary
Particle has discovered an issue with GPIO current leakage through Tracker One's M8 connector that affects Tracker One v1.0 devices manufactured prior to August 31, 2020.
If there is leakage current on the GPIO, Serial, or I2C pins to the Nordic MCU at the time when shipping mode is entered, the MCU can enter an unusual state where it cannot be woken from shipping mode by applying power to the USB or M8 connector as documented. If this occurs, the only way to wake the device is to fully disconnect the Li-Po battery, which requires opening the sealed Tracker One enclosure.
Devices that do not use the onboard M8 connector connector or shipping mode are not affected by this issue and are not at risk.
Products Affected
- Tracker One LTE M1 (NorAm) (ONE402MEA) v1.0
- Tracker One LTE CAT1/3G/2G (Europe) (ONE523MEA) v1.0
- Locate the serial number of the device by navigating to its device page in the Console, by using the CLI command
particle identify, by checking your device's original packaging, or by reading the value from the sticker on the device itself. - Example: P024AB029MJBHG7
- Characters 1-6 are for internal tracking, Character 7-9 identify the year and week of manufacturing.
- This Tracker One device in the example above was manufactured in 2020 (designated by the `0`, week 29 (designated by the `29`). This device would be subject to this Technical Advisory notice, since it was manufactured prior to Aug 31 (week 36).
Issue Mitigation
If you are not using the M8 connector to expand Tracker One or are not configuring your devices into Shipping Mode you will not be affected by this and no other mitigations are required.
If you are using the M8 connector, the easiest mitigation is to disconnect the M8 connector to your peripheral device before entering shipping mode. You can reconnect it after safely in sleeping mode if desired, or leave it disconnected during shipping.
This issue has been corrected in a subsequent revision of Tracker One (v1.1), expected in October 2020.
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