diff --git a/README.md b/README.md
index 48baa06..41576ce 100644
--- a/README.md
+++ b/README.md
@@ -66,9 +66,9 @@ Follow links to get them.
 
 Refer to [Sw_getting_started.md](docs/Sw_getting_started.md) 
 
-Some details about some specific implementations:
+Some details:
 - ESP8266 + MAX485 +  EPEVER Solar Tracer [HOW TO](docs/Esp8266_max485_epever_rj45.md)
-- ESP32 D1 MINI + MAX485 +  EPEVER Solar Tracer [HOW TO](docs/Esp32_d1_mini_max485_epever_rj45.md)
+- ESP32 + MAX485 +  EPEVER Solar Tracer [HOW TO](docs/Esp32_max485_epever_rj45.md)
 
 
 ## Reference
diff --git a/docs/Esp32_d1_mini_max485_epever_rj45.md b/docs/Esp32_max485_epever_rj45.md
similarity index 58%
rename from docs/Esp32_d1_mini_max485_epever_rj45.md
rename to docs/Esp32_max485_epever_rj45.md
index 3824e8d..5b8b18c 100644
--- a/docs/Esp32_d1_mini_max485_epever_rj45.md
+++ b/docs/Esp32_max485_epever_rj45.md
@@ -1,19 +1,22 @@
-# Connect  ESP32 D1 MINI  to EPEVER A/B Series ( + MAX485) 
+# Connect  ESP32 to EPEVER A/B Series ( + MAX485) 
 
 Here the material involved:
-* [ESP32 D1 MINI](https://www.aliexpress.com/premium/esp32-d1-mini.html?d=y&origin=y&catId=0&initiative_id=SB_20210919083440&SearchText=esp32%20d1%20mini)
+* ESP 32 MODULE, below the modules tested:
+	* [ESP32 D1 MINI](https://www.aliexpress.com/premium/esp32-d1-mini.html?d=y&origin=y&catId=0&initiative_id=SB_20210919083440&SearchText=esp32%20d1%20mini) 
+	* [ESP32 WROOM DEV MODULE](https://it.aliexpress.com/wholesale?catId=0&initiative_id=SB_20210919092741&isPremium=y&SearchText=esp+wroom-32+38+pin+devkit) 
+	* or any esp32 module you like
 * [EPSolar/EPEver Tracer A/B-Series](https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20170114172728&SearchText=tracer+mppt+rs485)
 * [MAX 485 UART Module](https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20210919083609&isPremium=y&SearchText=max485+module) 
 * An old ethernet cable with RJ45 connector you are happy to cut open
 
 
-## ESP32 D1 MINI <-> MAX485 module
+## ESP32 <-> MAX485 module
 
 ![This one worked for me](../images/max485_module.jpg)
 
 It's powered from `+5V` from ESP32 module, and wired as following:
 
-
+### ESP32 D1 MINI
 - `DI` -> `IO17` / `GPIO17` / `TX2`
 - `RO` -> `IO16` / `GPIO16` / `RX2`
 - `DE` and `RE` are interconnected with a jumper and then connected to pin  `TCK` / `GPIO13`
@@ -22,6 +25,14 @@ It's powered from `+5V` from ESP32 module, and wired as following:
 	
 ![ESP32 D1 MINI](../images/esp32_d1_mini_pins.png)
 
+### ESP32 WRROOM 38 PIN
+- `DI` -> `28` / `GPIO17` / `TX2`
+- `RO` -> `27` / `GPIO16` / `RX2`
+- `DE` and `RE` are interconnected with a jumper and then connected to pin  `15` / `GPIO13`
+- `VCC` to `+3.3V` / `3.3v` on ESP32
+
+![ESP32 WRROOM 38 PIN](../images/esp32_wroom_38_pin.jpg)
+
 ## MAX485 module <-> EPEVER CONTROLLER (RJ45)
 
 Cut open your ethernet cable and split out pin 3, 5, 7 (B, A, GND). Refer to [Tracer Modbus PDF](../docs/1733_modbus_protocol.pdf) for additional info.
@@ -38,14 +49,16 @@ Connect cables as follows:
 ## BASE SW CONFIGURATION
 
 Edits required on *src/config.h*:
-- `#define BOARD_ST_SERIAL_PIN_MAPPING_RX 16`
-- `#define BOARD_ST_SERIAL_PIN_MAPPING_TX 17`
+- `#define BOARD_ST_SERIAL_STREAM Serial2` [default]
 - Uncomment `#define USE_SERIAL_MAX485`
 - `#define MAX485_DE 13`
 - `#define MAX485_RE_NEG 13`
 
 Edit on *platformio.ini* (Platformio only):
-- `platformio.default_envs = wemos_d1_mini32` (usb/serial fw flash) or `platformio.default_envs = wemos_d1_mini32_ota` (ota fw flash)
+- **ESP32 MINI D1 - only**
+	- `platformio.default_envs = wemos_d1_mini32` (usb/serial fw flash) or `platformio.default_envs = wemos_d1_mini32_ota` (ota fw flash)
+- **ESP32 DEV MODULE - only**
+	- `platformio.default_envs = esp32dev` (usb/serial fw flash) or `platformio.default_envs = esp32dev_ota` (ota fw flash)
 
 You may need to make more changes according to your needs (ntp syn/led status/ data to monitor ...).
 
diff --git a/images/esp32_wroom_38_pin.jpg b/images/esp32_wroom_38_pin.jpg
new file mode 100644
index 0000000..0bb43f2
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