1 changed files with 48 additions and 5 deletions
--- a/components/search/esspressif_esp_search.md
+++ b/components/search/esspressif_esp_search.md
@ -2,22 +2,65 @@

 ## Selection criteria
 - Price
+  - $2-3
+    - ESP32-S2
+    - ESP32-C*
+  - $3-4
+    - ESP32-S3
 - Power
 - Module / Dev kits
 - Availability

-## Module Notes
- ESP32-S2 Mini/Solo still in production
- ESP32-S2 Wroom / Wrover NRFND (S3 in production)
+## Lead contenders

- ESP32-S3 WROOM/Mini
+- ESP-WROOM-02
+  - Main selection reasons:
+   - 2.7-3.6V
+   - $3-$3.50
+   - [7-16k in stock](https://octopart.com/search?q=esp-wroom-02&currency=USD&specs=0)
+   - [dev kit](https://octopart.com/search?q=ESP8266-DevKitC&currency=USD&specs=0)
+
+
+## Module Notes
+
+- [Product selector](https://products.espressif.com/#/product-selector?language=en&names=)
+- ESP (classic?) WROOM | Xtensa LX6 micro
+  - 2.7V-3.6V
+    - Having this voltage margin above a coin-cell will improve the life of the device and speed up development/testing
+    - all other modules use 3.0 V min, which is right where most coincells sit. We would have to add step-up regulator, and that will drain more current.
+  - ESP32 WRoom-DA (two complementary antennas)
+  - dev kits
+    - ESP8266-DevKitC-02D-F ESP-WROOM-02D
+    - ESP8266-DevKitC-02U-F ESP-WROOM-02U
+
+- ESP32-S2 Mini/Solo still in production $2-3 (mcu + wifi)
+  - Price: $2-3
+  - Power: Ivdd 0.5A min (too much current draw)
+    - Work mode Description Peak (mA)
+    - Active (RF working)
+      - TX
+        - 802.11b, 20 MHz, 1 Mbps, @19.5 dBm 310mA
+        - 802.11g, 20 MHz, 54 Mbps, @15 dBm 220mA
+        - 802.11n, 20 MHz, MCS7, @13.5 dBm 200mA
+        - 802.11n, 40 MHz, MCS7, @13.5 dBm 160mA
+       - RX 2
+        - 802.11b/g/n, 20 MHz 63
+        - 802.11n, 40 MHz 68
+- ESP32-S2 Wroom / Wrover NRFND (S3 in production)
+- power same as S2
+
+- ESP32-S3 WROOM/Mini $3-4 (mcu/ble/2.4 ghz wifi)

 - ESP32-C2 ESP8684-mini $2-3
+  - 13 mA with radio off
 - ESP32-C3 ESP8685-WROOM $2-3
+  - 17-22mA with modem off
+  - deep sleep RTC counter 5 uA
 - ESP32-C6 Mini $2.50-$3
+  - deep sleep 5 uA
 - ESP32-H2 Mini/WROOM no stock

- ESP (classic?) WROOM | Xtensa LX6 micro
+

 - ESP8266 WROOM $3+