There are many places where useful logs reside. This details all those places, and the easiest way to get a hold of them.
On a laptop or desktop
To check if there are relevant logs open up the developer console in your browser. The shortcut is probably COMMAND+OPTION+I on MacOS, or CTRL+SHIFT+I on Linux and Windows. Click the console tab and copy out any errors or logging that you think is relevant.
On a phone
There are two types of logs updated by Android devices depending on what information is needed. If you trying to get either of the logs from a device for the first time you need to set it up for USB debugging.
Enable USB debugging on the phone. This varies from phone to phone, but here is the official Android documentation.
Connect your phone by USB to the computer.
On your phone, you will see a popup “Allow USB debugging. The computer’s RSA fingerprint…”, click “OK”.
Now that you’ve enabled USB debugging on the phone you can access the dev console on the phone via USB from your desktop browser. This allows the same level of debugging and inspection you have on a desktop browser, but from your phone’s browser in the CHT app. Follow the official Android documentation to access the console.
The Android log is written to from the cht-android wrapper which captures errors like application crashes or failing integrations between Android apps.
To install the
adbcommand, follow the instructions under the Development Environment > Debug tool adb section.
Within a command line session, write the following command:
To check if your phone is properly connected, write the command
adb devices. This will list the devices connected.
Type the command
adb logcat > phone.logto get the android logs in the file
phone.log. The log will be written to the
phone.logfile as long as this command is running. You can stop the recording at any time pressing Ctrl+C. Now if you reproduce the error on the phone you can look for any useful information being written to the
This will get all the logs from the device, not just logs for the app you want to debug. You can pass arguments to
adb to only get the logs you want.
adb logcat MedicMobile:V AndroidRuntime:E chromium:V '*:S' > phone.log
Alternatively you can use
grep to filter the logs down to only those from the relevant app.
adb logcat | grep MedicMobile > phone.log
On the server
Some unexpected errors are caught and stored in
feedback docs and stored on the phone and later synced to CouchDB on the server. To access these, look for docs in the
medic-users-meta databases. This is particularly useful to debug issues where you do not have physical access to the device. More information is available under Managing Databases.
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