diff --git a/source/_integrations/orangepi_gpio.markdown b/source/_integrations/orangepi_gpio.markdown
index 253f0a25410..1f1fa3cf57e 100644
--- a/source/_integrations/orangepi_gpio.markdown
+++ b/source/_integrations/orangepi_gpio.markdown
@@ -79,6 +79,8 @@ As this platform supports different types of GPIO pinouts for difference Orange
 | `zeroplus2` | Supports the Orange Pi Zero Plus 2 |
 | `duo` | Supports the NanoPi Duo |
 | `neocore2` | Supports the NanoPi Neocore 2 |
+| `pi4` | Supports the Orange pi 4 |
+| `pi4B` | Supports the Orange pi 4B |
 
 ## Additional steps
 
@@ -102,6 +104,8 @@ This integration uses interrupts to catch changes on your pins. However, it depe
 
 You can find the pinouts of all the supported Orange Pi devices [here](https://pascalroeleven.nl/2020/04/13/orange-pi-gpio-pinouts/). The pinouts for the [NanoPi Duo](http://wiki.friendlyarm.com/wiki/index.php/NanoPi_Duo) and [NanoPi NEO Core2](http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO_Core2) can be found on the [FriendlyARM wiki](http://wiki.friendlyarm.com/). For example: If a pin is named PA01, the pin bank is PA. If this pin bank is in the following table after your chipset, this particular pin is supported.
 
+For the orange pi4 and pi4B, using the Rockchip RK3399 chip, a manual and technical doc can be found [here](https://drive.google.com/drive/folders/1QMU5n-7fCx28cQPH_lu2L0wrFWeC3G45).
+
 | Chipset | Pin banks which support external interrupts |
 | ------- | ------------------------------------------- |
 | H2+ | PA, PG, PL |
@@ -123,3 +127,4 @@ In the table below you can see the number of usable pins for sensors per device.
 | H6 (Lite 2, One Plus) | 3/17 |
 | H6 (PI 3) | 8/17 |
 | A64 (Win Plus) | 18/28 |
+| RK3399 (PI4, PI4B) | 28/28 |