def help(update, context):
    """Send a message when the command /help is issued."""
    update.message.reply_text(
        """Send:
/plot start end i,j,k... 
to get a plot of cultures No. i, j, k...
"""
         +
        """from the time moment start  till the end. 
Example:
/plot 5h 1w 0,1,2,3,4,5,6
"""
         +
        'plots the OD in 0th, 1st, ..., 6th tubes from t=5h to t = 1week \n\n'
         +
        """/pumpdata for pump_data.csv
/rawsignal for raw_signal.csv

""" +
        '/getvolumes to get death volumes\n' +
        '/getthresholds to get thresholds\n' + '/lastdata\n' +
        """/setvolumes 0,1,2,3,4,5,6 to change volumes. Only for the registered IDs!
"""
         +
        '/setthresholds 0,1,2,3,4,5,6 to change thresholds. Only for the registered IDs!\n'
         + """/plotOD
 /convertODs 
/setconditions tube,vol,ODraw""")
