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+====== WIOBoost Central DCC station, booster or Motor controller. ======
+[[english|{{  rocrail-logo-35.png}}]]
+  * [[:hardware-en|GCA Hardware]]
+    * [[:hardware-en#wio|GCA WIO]]
+    * [[:wio:firststeps-en|WIO First steps]]
+ \\
+^Copyright Rob Versluis and Peter Giling^
+{{ :gca:wioboost_pict_01.jpg?300|}}
+\\
+===== Description =====
+This unit , commanded via Wifi, is using the same firmware of WIO_01.\\
+It uses the same H-Bridge as used in ORD-3 booster, giving a max  power of more than 3 Amp.\\
+By simply making the right settings, WIOBoost will behave as described:\\
+  * DCC Central station (display connection also available)
+  * Booster with its own current limit switch.
+  * PWM motor speed control.
+The complete WIOBoost is basically not more than an ESP8266 D1 module, a power driver L6203 and a voltage regulator.\\
+The large white resistor in the midle of the board is a 0,47 Ohm resistor where the current is measured.\\
+The standard A/D converter in the ESP is not really accurate, but yet suitable for overcurrent protection.\\
+===== Power supply =====
+The WIOBoost is set up in the same way as ORD-3, with its own DC rectifier and switching power supply.\\
+The enables to adapt the voltage to rails adapted to the scale you are using.\\
+There are a few levels that should be considered.\\
+N scale needs 12 - 16 Volt\\
+HO scale needs 15 to 20 Volt\\
+Scale G, 1 and 0  need 19 to 24 Volt\\
+It is advisable to select the right voltage for the WIOBoost.\\
+The WIOBoost will be available as complete kit or just pcboards.\\ \\
+\\
+===== Central station=====
+When WIOBoost is set for DCC, it will provide the loc commands to the rails, with a maximum current of approx 3 Amps.\\
+The default setting for the WIO output current is set to 1 Amp, and can be changed in the WIO settings.\\
+===== Booster =====
+In fact the same function as central station, but the pulses com in from another WIOBoost.\\
+Booster will switch on its rail output, when a decent DCC signal is received.\\
+ ===== Motor drive =====
+The pulse output from D32 can also be set as PWM, which will control the speed of a connected motor.\
+=====Short circuit protection=====
+Th L6203 is provided with its own high current and high temperature protection.\\
+But in  practice we need a faster reaction on too high current.\\
+The booster itself (like the central station), will shut off when the max amps is reached.\\
+This maximum current, by default set tot 1 Amp, can be changed in WIO settings.\\
+After shut off, the WIOBoost will wait approx 5 seconds, and after that will try to start up again.\\
+In this short circuit situation, the pulses from the central station remain available, even when the\\
+central station itself found short circuit.\\
+The H-bridge is controlled that way by the enable input, without effecting eventually connected following WIOBoost units.\\
+===== Multiple boosters=====
+Tne IBB1 connector of the WIOBoost is available for connection a following -as Booster set- WIOBoost.\\
+Railsections, connected to different boosters, should be separated with al least on rail cut of the two.\\
+The short time that a train is getting power from two boosters, is no problem at all.\\
+Even the cutout for Railcom is 100% in phase, between boosters.\\
+===== Connections =====
+==== IBB1 ====
+Inter Booster Bus.\\
+To connect the next booster .\\
+**Important note:**
+All WIOBoost units, that are interconnected via this way, should have their own power supply, isolated from each other.\\
+==== SER1 ====
+A standard serial bus connection, same as om GCA_PI01.\\
+So far, used to connect an ID-12 RFID sensor.\\
+Further applications might be developed.\\
+==== IIC1 ====
+The standard I2C connector.\\
+This bus is very large in options, so far now, only used to connect a display.\\
+The supply for the display can be selected with JP1 between 3,3 and 5 Volt.\\
+}
+==== Hardware ====
+|  {{ :gca:wioBoost_orc_sch.pdf | The schematic drawing}}  |
+|  {{ :gca:wioboost_pcb.pdf | the pcb and parts positions}}  |
+|  {{ :gca:wio_boost_v2_parts.pdf |Bill of materials}}  |
+\\
+===== Assembling remarks =====
+Put all parts in same order as on parts list, including the headers for LOlinD1.\\
+The usb connector for programming can be reached while on board.\\
+VIN is to be connected to any suitable transformer or power supply.
+After switching on power, check voltage on 5V & GND pins of U1 (pins closest to IIC1).\\
+If this unit is supposed to function as booster, first make configuration without IBB1 connected.\\