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Shimano e-Steps
This repository is dedicated to the Shimano e-Steps as I happen to have an e-Bike that is fitted with the Shimano drive-train. There is hardly any technical information on the electronics, so I decided to do a little exploring myself.
e-Bikes
Electrification of a bike is very populair. There are two basic bike types:
- pedelec, limited to 25km/h, no helmet required
- speed e-bike, limited to 45km/h, requires a helmet, insurance
Among the pedelecs, drive-trains of Bosch, Shimano, Bafang and Yamaha are used as well as automatic transmission systems of Shimano, NuVinci, etc. which make riding a bike a joy.
Experiments
I ordered a bunch of accessoires and started experimenting...
Add the EW-WU111
For anyone that thinks that just adding the Bluetooth module to the bike: it doesn't work.
- Connect EW-WU111 to EW-SD50
- Take out any connection on the bike
- Place the interface and cable in between
- Pressing the power button
The display stays clear and the e-steps system does not turn on.
- Restore the situation
- Pressing the power button
The display turns on and the e-steps system works like before.
Use the SM-PCE1
Let's try to hookup the PC interface. For that we install the software on a PC.
- Preinstall Microsoft
dotnetfx35.exesoftware as this is required. You can find this on the Microsoft website. - Install the Shimano software
e-tube project. This can be found on the Shimano website. - Put the
SM-JC41junction box in one of the wires from the e-bike system - Attach the
SM-PCE1to the USB port - Attach the special cable to the SM-PCE1 and the other end to the junction box
Accessoires
SM-PCE1 PC Linkage Device
The SM-PCE1 is an USB interface to connect the e-Steps system to a PC. It is used for service, configuration and maintenance. It is normally not required for a bike owner to have such an interface, but my curiosity was triggered to find out if I can hookup Bluetooth to my bike.
Super Capacitor
Strangely enough the PCB has two super-capacitors. These are 2.5V and stacked so they can handle 5V.
mini USB Interface
The USB interface is a Texas Instruments chip,
EW-WU111 Wireless Unit
The EW-WU111 is a wireless interface with ANT and BLE wireless standards. The interface can be placed in between a wireless connection cable.
EW-SD50 Electric Wire
The EW-SD50 is a piece of wire in various lengths with connectors at both ends. The length of the wire can be ordered between 150mm and 1600mm.
SM-JC41 Junction Box for Di2
SM-DUE10 Speed Sensor
The SM-DUE10 is a Reed switch with an attached cable, together with a magnet that can be attached to the spoke of a wheel. It is handy to have the magnet around if ever you loose the magnet the e-bike doesn't function anymore.