Difference between revisions of "MCP23017"
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---- | ---- | ||
| − | [[ | + | [[File:MCP23017DIP28.jpg|320px]] |
---- | ---- | ||
| − | = | + | = Introduction = |
| − | + | The number of GPIO pins on the ESP module can be expanded with a IO Expander. We will use the MCP23017 that provides 16 more outputs. This way it becomes possible to control a 16 channel relay board. | |
= Hardware = | = Hardware = | ||
| − | + | The MCP23017 needs to be connected through the I2C interface. This chip is compatible with 3V3 and it can be connected to the ESP without levelshifters.. | |
| − | == | + | == Connections == |
MCP23017 ESP-01 | MCP23017 ESP-01 | ||
| Line 17: | Line 17: | ||
= Software = | = Software = | ||
| + | |||
== ESP Easy == | == ESP Easy == | ||
== ESP Connextio == | == ESP Connextio == | ||
| − | + | Command: | |
''<nowiki>MCPWiredOut <pin nr>,<On/Off></nowiki>'' | ''<nowiki>MCPWiredOut <pin nr>,<On/Off></nowiki>'' | ||
| Line 40: | Line 41: | ||
|} | |} | ||
| − | === | + | === Sample === |
MCPWiredOut 1,On | MCPWiredOut 1,On | ||
Revision as of 20:04, 24 August 2015
Contents
Introduction
The number of GPIO pins on the ESP module can be expanded with a IO Expander. We will use the MCP23017 that provides 16 more outputs. This way it becomes possible to control a 16 channel relay board.
Hardware
The MCP23017 needs to be connected through the I2C interface. This chip is compatible with 3V3 and it can be connected to the ESP without levelshifters..
Connections
MCP23017 ESP-01 GND GND VCC VCC SDA GPIO 0 SCL GPIO 2
Software
ESP Easy
ESP Connextio
Command:
MCPWiredOut <pin nr>,<On/Off>
| Parameter: | Beschrijving: | Bereik: | Opmerking: |
|---|---|---|---|
| Pin nr | Output pin | 1 t/m 16 | |
| On/Off | Aan of Uit | On/Off |
Sample
MCPWiredOut 1,On
