From dd59296be9c7589406b668d085a18d2349d498f3 Mon Sep 17 00:00:00 2001
From: "Sergio R. Caprile" <scaprile@cesanta.com>
Date: Thu, 18 Aug 2022 14:57:28 -0300
Subject: [PATCH] Improved Makefile to be able to flash subtle mod in main.c
 comment

---
 examples/esp8266/Makefile        | 21 ++++++++++++++++++---
 examples/esp8266/README.md       |  6 +++++-
 examples/esp8266/src/main/main.c |  2 +-
 3 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/examples/esp8266/Makefile b/examples/esp8266/Makefile
index e838935d..aedce8d7 100644
--- a/examples/esp8266/Makefile
+++ b/examples/esp8266/Makefile
@@ -1,13 +1,28 @@
 THISDIR = $(realpath $(CURDIR))
 ROOTDIR = $(realpath $(CURDIR)/../..)
+DOCKER ?= docker run --rm $(DA) -v $(ROOTDIR):$(ROOTDIR) -w $(THISDIR) docker.io/mdashnet/8266
+CMD ?= make -C src defconfig app
+PORT ?= /dev/ttyUSB0
 
 all: example
 
 example:
 	true
 
-build: src/main/main.c src/main/wifi.c Makefile
-	docker run --rm -v $(ROOTDIR):$(ROOTDIR) -w $(THISDIR) docker.io/mdashnet/8266 make -C src defconfig app
+build: Makefile $(wildcard src/main/*)
+	$(DOCKER) $(CMD)
+
+flash:
+flash: CMD = python /esp/components/esptool_py/esptool/esptool.py \
+	--chip esp8266 --port $(PORT) --baud 115200 --before default_reset \
+	--after hard_reset write_flash -z --flash_mode dio --flash_freq 40m \
+	--flash_size 2MB 0x10000 $(THISDIR)/src/build/mongoose-example.bin
+flash: DA = --device $(PORT)
+flash: build
+
+.PHONY: build
 
 clean:
-	rm -rf build
+clean: CMD = rm -rf src/build	
+clean: build
+
diff --git a/examples/esp8266/README.md b/examples/esp8266/README.md
index 324abb9e..61fa661e 100644
--- a/examples/esp8266/README.md
+++ b/examples/esp8266/README.md
@@ -14,5 +14,9 @@ To build this application, follow these steps:
 4. Run `make`. This invokes a Docker-based build. A firmware will be built
   in the `src/build/` directory:
   ```sh
-  make example
+  make build
+  ```
+5. Flash your ESP8266. If you have esptool.py installed, the build process will end telling you the command to flash your device. You can just run `make` again to use Docker:
+  ```sh
+  make flash PORT=/your/serial
   ```
diff --git a/examples/esp8266/src/main/main.c b/examples/esp8266/src/main/main.c
index 125a478b..55708e2a 100644
--- a/examples/esp8266/src/main/main.c
+++ b/examples/esp8266/src/main/main.c
@@ -18,7 +18,7 @@ static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
 
 // Event handler for a client connection - fetch the first web page in history
 // To enable TLS for HTTP,
-//   1. Copy "ca.pem" file to the ESP32 flash FS
+//   1. Copy "ca.pem" file to the ESP8266 flash FS
 //   2. Add TLS init snippet for the connection, see examples/http-client
 static void cb2(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_CONNECT) {