fixed typos

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Lurkars 2020-12-14 09:28:46 +01:00
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# esp-ena
Implementation of contact tracing with the Covid-19 Exposure Notification API by Apple and Google on an ESP32 (with [ESP-IDF](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/index.html)).
More information about the Covid-19 Exposure Notification at [Apple](https://www.apple.com/covid19/contacttracing/) and [Google](https://www.google.com/covid19/exposurenotifications/). This is fully compatible with the official API and is meant for people without smartphone or without access to Apples/Googles implementation.
More information about the Covid-19 Exposure Notification at [Apple](https://www.apple.com/covid19/contacttracing/) and [Google](https://www.google.com/covid19/exposurenotifications/). This is fully compatible with the official API and is meant for people without smartphone or without access to Apple/Google's implementation.
The main source (the Exposure Notification API) is also available in a separate branch in [**component**](https://github.com/Lurkars/esp-ena/tree/component).
This implementation fully covers the BLE part including the cryptography specifications needed and the exposure check.
The following acronyms will be used in code and comments:
* *ENA* Exposure Notification Api
* *ENIN* ENIntervalNumber - timestamp with 10 minutes resolution
* *ENA* Exposure Notification API
* *ENIN* ENIntervalNumber - timestamp 10 minutes resolution
* *TEK* Temporary Exposure Key - personal secret key changed every 24h, published when infected
* *RPI* Rolling Proximity Identifier - send and received identifer changed every 10 minutes
* *RPI* Rolling Proximity Identifier - send and received identifier changed every 10 minutes
* *AEM* Associated Encrypted Metadata - send and received metadata
### Features implemented
@ -19,7 +19,7 @@ The following acronyms will be used in code and comments:
* BLE privacy (change random MAC address in random interval)
* permanent storage on flash of last keys, beacons and exposures (storage is limited, see [storage math](#some-storage-math) for details)
* calculating exposure risks/scores (after adding reported keys and storing exposure information) as defined in [ENExposureConfiguration (Apple v1)](https://developer.apple.com/documentation/exposurenotification/enexposureconfiguration/calculating_the_exposure_risk_value_in_exposurenotification_version_1)
* receive Exposue Key export from an ENA Exposure Key export proxy server [ena-eke-proxy module](#ena-eke-proxy), see [ena-eke-proxy server reference implemenation](https://github.com/Lurkars/ena-eke-proxy)
* receive Exposure Key export from an ENA Exposure Key export proxy server [ena-eke-proxy module](#ena-eke-proxy), see [ena-eke-proxy server reference implemenation](https://github.com/Lurkars/ena-eke-proxy)
* Upload of own Exposure keys to proxy server
### Additional features for full ENA device
@ -30,17 +30,17 @@ The following acronyms will be used in code and comments:
* interface with a 7 button control (joystick up,down,left,right,enter,cancel,ok) to
* show exposure status
* set time
* connect to wifi
* connect to WiFi
* delete data
* set language
* enter tan and uploading own exposure keys
* battery support with ESP32 dev-boards with integrated LiPo support
* battery support with ESP32 development boards with integrated LiPo support
#### M5StickC and M5StickC PLUS
* RTC support
* PMU support
* display support
* interface with 2 buttons and accelometer control
* interface with 2 buttons and accelerometer control
* ok/cancel with button 1 and button 2 (depending on screen orientation)
* up, down, left, right with tilting device
* long press button 1 for changing character set on input
@ -87,7 +87,7 @@ idf.py menuconfig
```
**required**
* enable bluetooth (BLE)
* enable Bluetooth (BLE)
> Component config -> Bluetooth -> [*] Bluetooth
* add partition-table for storage (currently hardcoded name "ena")
> Partition Table -> Partition table -> (x) Custom partition table CSV
@ -145,7 +145,7 @@ The project is divided in different components. The main.c just wrap up all comp
### ena
The ena module contains the main functions of eps-ena with bluetooth scanning and adverting, storing data, handle beacons and check exposure.
The ena module contains the main functions of eps-ena with Bluetooth scanning and advertising, storing data, handle beacons and check exposure.
* *ena-beacons* handles scanned data by storing temporary beacons, check for threshold and store beacons permanently
* *ena-crypto* covers cryptography part (key creation, encryption etc.)
* *ena-storage* storage part to store own TEKs and beacons
@ -156,13 +156,13 @@ The ena module contains the main functions of eps-ena with bluetooth scanning an
### ena-eke-proxy
This module is for connecting to an Exposue Key export proxy server. The server must provide daily (and could hourly) fetch of daily keys in binary blob batches with the following format
This module is for connecting to an Exposure Key export proxy server. The server must provide daily (and could hourly) fetch of daily keys in binary blob batches with the following format
| Key Data | Rolling Start Interval Number | Rolling Period | Days Since Onset Of Symptoms |
| :------: | :---------------------------: | :------------: | :--------------------------: |
| 16 bytes | 4 bytes | 4 bytes | 4 bytes |
Request url is parametrized with {day-string},({hour} in hourly mode,) {page}, {page-size}.
Request URL is parametrized with {day-string},({hour} in hourly mode,) {page}, {page-size}.
### interface
@ -186,7 +186,7 @@ Interface with 7 button input.
### interface-input-m5
Interface with input for M5StickC (PLUS) with 2 button input and accelometer as axis input.
Interface with input for M5StickC (PLUS) with 2 button input and accelerometer as axis input.
### rtc-ds3231
@ -216,14 +216,14 @@ I²C driver for MPU6886 6-Axis IMU of M5StickC (PLUS).
I²C driver for AXP192 PMU of M5StickC (PLUS).
### ena-binary-export \[deprecared\]
### ena-binary-export \[deprecated\]
Module to decode Exposure Key export. \[Depracated through ena-eke-proxy module\]
Module to decode Exposure Key export. \[Deprecated through ena-eke-proxy module\]
### ena-cwa \[deprecared\]
### ena-cwa \[deprecated\]
Connection to german Exposure App ([Corona Warn App](https://github.com/corona-warn-app)) for download Exposure Key export (and maybe later report infection). \[Depracated through ena-eke-proxy module\]
Connection to German Exposure App ([Corona Warn App](https://github.com/corona-warn-app)) for download Exposure Key export (and maybe later report infection). \[Deprecated through ena-eke-proxy module\]
### nanopb \[deprecared\]
### nanopb \[deprecated\]
[Nanopb](https://github.com/nanopb/nanopb) for reading Protocol Buffers of Exposure Key export. Including already generated Headers from *.proto files. \[Depracated through ena-eke-proxy module\]
[Nanopb](https://github.com/nanopb/nanopb) for reading Protocol Buffers of Exposure Key export. Including already generated Headers from *.proto files. \[Deprecated through ena-eke-proxy module\]