Bicycle controller for bicycle equipped with assist device and gear change device

A bicycle controller comprising:

• an electronic controller including a processor, the electronic controller being configured to control an output of a motor that assists human power inputted to a bicycle, the electronic controller calculating a value of the output of the motor based on a detected value of human power and controlling the output of the motor based on the calculated value,
• the electronic controller being further configured to:
• determine whether a gear change request to change a gear ratio of the bicycle has been received,
• determine whether a rotation phase of a crank of the bicycle has reached a first phase after receiving the gear change request, the first phase being set based on an inclination of the bicycle in a front-rear direction,
• switch a control state of the motor from a first control state to a second control state upon determining that the rotation phase has reached the first phase after receiving the gear change request,
• while the control state of the motor is the second control state, operate a gear changer of the bicycle after receiving the gear change request and use the calculated value of the output of the motor without modifying the calculated value,
• while the control state of the motor is the first control state, repeatedly determine whether the detected value of human power is decreasing by determining whether a currently detected value of human power is smaller than an immediately preceding detected value of human power, and
• upon determining that the detected value of human power is decreasing while the control state of the motor is the first control state, modify the calculated value of the output of the motor such that the modified calculated value is greater than the calculated value and such that a ratio of the output of the motor with respect to the detected value of human power is larger than when the detected value of human power is decreasing while the motor is in the second control state, and
• upon determining that the detected value of human power is increasing, use the calculated value of the output of the motor without modifying the calculated value such that the ratio is the same regardless of whether the motor is in the first control state or the second control state.