call to google chart crashes

[humpataa]

The class is obviously using a google api to generate the qr-code image. This sometimes crashes with 400 or 502 (seem to be temporary issues) making the class crash as well. Is there a way to not use google?

Example:
[https://chart.apis.google.com/chart?cht=qr&chs=350x350&chld=L|0&chl=BCD%0A001%0A1%0ASCT%0AHYVEDEMM300%0AManfred%0ADE81200300000011223344%0AEUR53%2C55%0A%0A%0AR+137747](https://chart.apis.google.com/chart?cht=qr&chs=350x350&chld=L%7C0&chl=BCD%0A001%0A1%0ASCT%0AHYVEDEMM300%0AManfred%0ADE81200300000011223344%0AEUR53,55%0A%0A%0AR+137747)

Please advise.