diff --git a/components/luatfonts/luat_lib_fonts.c b/components/luatfonts/luat_lib_fonts.c
index c53291d69..ddb7c1850 100644
--- a/components/luatfonts/luat_lib_fonts.c
+++ b/components/luatfonts/luat_lib_fonts.c
@@ -63,7 +63,51 @@ static const u8g2_font_t u8g2_fonts[] = {
 #ifdef USE_U8G2_OPPOSANSM32_CHINESE
     {.name="opposansm32_chinese", .font=u8g2_font_opposansm32_chinese},
 #endif
+#ifdef USE_U8G2_SARASA_ENGLISH
+    { .name="font_sarasa_m8_ascii", .font=u8g2_font_sarasa_m8_ascii},
+    { .name="font_sarasa_m10_ascii", .font=u8g2_font_sarasa_m10_ascii},
+    { .name="font_sarasa_m12_ascii", .font=u8g2_font_sarasa_m12_ascii},
+    { .name="font_sarasa_m14_ascii", .font=u8g2_font_sarasa_m14_ascii},
+    { .name="font_sarasa_m16_ascii", .font=u8g2_font_sarasa_m16_ascii},
+    { .name="font_sarasa_m18_ascii", .font=u8g2_font_sarasa_m18_ascii},
+    { .name="font_sarasa_m20_ascii", .font=u8g2_font_sarasa_m20_ascii},
+    { .name="font_sarasa_m22_ascii", .font=u8g2_font_sarasa_m22_ascii},
+    //再大的很少用到先不加了
+#endif
 
+#ifdef USE_U8G2_SARASA_M8_CHINESE
+    { .name="font_sarasa_m8_chinese", .font=u8g2_font_sarasa_m8_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M10_CHINESE
+    { .name="font_sarasa_m10_chinese", .font=u8g2_font_sarasa_m10_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M12_CHINESE
+    { .name="font_sarasa_m12_chinese", .font=u8g2_font_sarasa_m12_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M14_CHINESE
+    { .name="font_sarasa_m14_chinese", .font=u8g2_font_sarasa_m14_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M16_CHINESE
+    { .name="font_sarasa_m16_chinese", .font=u8g2_font_sarasa_m16_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M18_CHINESE
+    { .name="font_sarasa_m18_chinese", .font=u8g2_font_sarasa_m18_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M20_CHINESE
+    { .name="font_sarasa_m20_chinese", .font=u8g2_font_sarasa_m20_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M22_CHINESE
+    { .name="font_sarasa_m22_chinese", .font=u8g2_font_sarasa_m22_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M24_CHINESE
+    { .name="font_sarasa_m24_chinese", .font=u8g2_font_sarasa_m24_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M26_CHINESE
+    { .name="font_sarasa_m26_chinese", .font=u8g2_font_sarasa_m26_chinese},
+#endif
+#ifdef USE_U8G2_SARASA_M28_CHINESE
+    { .name="font_sarasa_m28_chinese", .font=u8g2_font_sarasa_m28_chinese},
+#endif
 #ifdef LUAT_FONTS_CUSTOM_U8G2
     LUAT_FONTS_CUSTOM_U8G2
 #endif
diff --git a/demo/libgnss_530Z/main.lua b/demo/libgnss_530Z/main.lua
new file mode 100644
index 000000000..fa166b8e5
--- /dev/null
+++ b/demo/libgnss_530Z/main.lua
@@ -0,0 +1,245 @@
+-- LuaTools需要PROJECT和VERSION这两个信息
+PROJECT = "gnss"
+VERSION = "1.0.0"
+
+--[[
+本demo是演示定位数据处理的. script/turnkey目录有更完整的应用.
+本demo需要V1103及以上的固件!!
+注意: 室内无信号!! 无法定位!!! 到室外去, 起码天线要在室外.
+窗口只有少许信号, 无法保证定位成功
+
+这个demo需要的流量很多,可以注释这行
+sys.publish("mqtt_pub", "/gnss/" .. mobile.imei() .. "/up/nmea", data, 1)
+]]
+
+-- sys库是标配
+local sys = require("sys")
+require("sysplus")
+
+local gps_uart_id = 2
+local mqttc = nil
+
+libgnss.clear() -- 清空数据,兼初始化
+
+uart.setup(gps_uart_id, 9600)
+
+function exec_agnss()
+    if http then
+        -- AGNSS 已调通
+        while 1 do
+            local code, headers, body = http.request("GET", "http://download.openluat.com/9501-xingli/CASIC_data.dat").wait()
+            -- local code, headers, body = http.request("GET", "http://nutzam.com/6228.bin").wait()
+            log.info("gnss", "AGNSS", code, body and #body or 0)
+            if code == 200 and body and #body > 1024 then
+                -- uart.write(gps_uart_id, "$reset,0,h01\r\n")
+                -- sys.wait(200)
+                -- uart.write(gps_uart_id, body)
+                for offset=1,#body,512 do
+                    log.info("gnss", "AGNSS", "write >>>", #body:sub(offset, offset + 511))
+                    uart.write(gps_uart_id, body:sub(offset, offset + 511))
+                    -- sys.waitUntil("UART2_SEND", 100)
+                    sys.wait(100) -- 等100ms反而更成功
+                end
+                -- sys.waitUntil("UART2_SEND", 1000)
+                io.writeFile("/6228.bin", body)
+                break
+            end
+            sys.wait(60*1000)
+        end
+    end
+    sys.wait(20)
+    -- "$AIDTIME,year,month,day,hour,minute,second,millisecond"
+    local date = os.date("!*t")
+    if date.year > 2022 then
+        local str = string.format("$AIDTIME,%d,%d,%d,%d,%d,%d,000", 
+                         date["year"], date["month"], date["day"], date["hour"], date["min"], date["sec"])
+        log.info("gnss", str)
+        uart.write(gps_uart_id, str .. "\r\n") 
+        sys.wait(20)
+    end
+    -- 读取之前的位置信息
+    local gnssloc = io.readFile("/gnssloc")
+    if gnssloc then
+        str = "$AIDPOS," .. gnssloc
+        log.info("POS", str)
+        uart.write(gps_uart_id, str .. "\r\n")
+        str = nil
+        gnssloc = nil
+    else
+        -- TODO 发起基站定位
+        uart.write(gps_uart_id, "$AIDPOS,3432.70,N,10885.25,E,1.0\r\n")
+    end
+end
+
+function upload_stat()
+    if mqttc == nil or not mqttc:ready() then return end
+    local stat = {
+        csq = mobile.csq(),
+        rssi = mobile.rssi(),
+        rsrq = mobile.rsrq(),
+        rsrp = mobile.rsrp(),
+        --iccid = mobile.iccid(),
+        snr = mobile.snr()
+    }
+    sys.publish("mqtt_pub", "/gnss/" .. mobile.imei() .. "/up/stat", (json.encode(stat)), 1)
+end
+
+sys.timerLoopStart(upload_stat, 60*1000)
+
+sys.taskInit(function()
+    -- Air780EG工程样品的GPS的默认波特率是9600, 量产版是115200,以下是临时代码
+    log.info("GPS", "start")
+    pm.power(pm.GPS, true)
+    -- 绑定uart,底层自动处理GNSS数据
+    -- 第二个参数是转发到虚拟UART, 方便上位机分析
+    libgnss.bind(gps_uart_id, uart.VUART_0)
+    libgnss.on("raw", function(data)
+        -- 默认不上报, 需要的话自行打开
+        data = data:split("\r\n")
+        if data == nil then
+            return
+        end
+        for k, v in pairs(data) do
+            if v and v:startsWith("$GNRMC") then
+                sys.publish("mqtt_pub", "/gnss/" .. mobile.imei() .. "/up/nmea", v, 0)
+            end
+        end
+    end)
+    sys.wait(200) -- GPNSS芯片启动需要时间
+    -- 调试日志,可选
+    libgnss.debug(true)
+    -- 显示串口配置
+    -- uart.write(gps_uart_id, "$CFGPRT,1\r\n")
+    -- sys.wait(20)
+    -- 增加显示的语句
+    uart.write(gps_uart_id, "$CFGMSG,0,1,1\r\n") -- GLL
+    sys.wait(20)
+    uart.write(gps_uart_id, "$CFGMSG,0,5,1\r\n") -- VTG
+    sys.wait(20)
+    uart.write(gps_uart_id, "$CFGMSG,0,6,1\r\n") -- ZDA
+    sys.wait(20)
+    -- 定位成功后,使用GNSS时间设置RTC, 暂不可用
+    -- libgnss.rtcAuto(true)
+    exec_agnss()
+end)
+
+sys.taskInit(function()
+    while 1 do
+        sys.wait(5000)
+        -- 6228CI, 查询产品信息, 可选
+        -- uart.write(gps_uart_id, "$PDTINFO,*62\r\n")
+        -- uart.write(gps_uart_id, "$AIDINFO\r\n")
+        -- sys.wait(100)
+        
+        -- uart.write(gps_uart_id, "$CFGSYS\r\n")
+        -- uart.write(gps_uart_id, "$CFGMSG,6,4\r\n")
+        log.info("RMC", json.encode(libgnss.getRmc(2) or {}))
+        -- log.info("GGA", libgnss.getGga(3))
+        -- log.info("GLL", json.encode(libgnss.getGll(2) or {}))
+        -- log.info("GSA", json.encode(libgnss.getGsa(2) or {}))
+        -- log.info("GSV", json.encode(libgnss.getGsv(2) or {}))
+        -- log.info("VTG", json.encode(libgnss.getVtg(2) or {}))
+        -- log.info("ZDA", json.encode(libgnss.getZda(2) or {}))
+        -- log.info("date", os.date())
+        log.info("sys", rtos.meminfo("sys"))
+        log.info("lua", rtos.meminfo("lua"))
+    end
+end)
+
+-- 订阅GNSS状态编码
+sys.subscribe("GNSS_STATE", function(event, ticks)
+    -- event取值有 
+    -- FIXED 定位成功
+    -- LOSE  定位丢失
+    -- ticks是事件发生的时间,一般可以忽略
+    log.info("gnss", "state", event, ticks)
+    if event == "FIXED" then
+        local locStr = libgnss.locStr()
+        log.info("gnss", "locStr", locStr)
+        if locStr then
+            io.writeFile("/gnssloc", locStr)
+        end
+    end
+end)
+
+-- mqtt 上传任务
+sys.taskInit(function()
+	sys.waitUntil("IP_READY", 15000)
+
+    mqttc = mqtt.create(nil, "lbsmqtt.airm2m.com", 1886)  --mqtt客户端创建
+
+    mqttc:auth(mobile.imei(), mobile.imei(), mobile.muid()) --mqtt三元组配置
+    log.info("mqtt", mobile.imei(), mobile.imei(), mobile.muid())
+    mqttc:keepalive(30) -- 默认值240s
+    mqttc:autoreconn(true, 3000) -- 自动重连机制
+
+    mqttc:on(function(mqtt_client, event, data, payload)  --mqtt回调注册
+        -- 用户自定义代码，按event处理
+        --log.info("mqtt", "event", event, mqtt_client, data, payload)
+        if event == "conack" then -- mqtt成功完成鉴权后的消息
+            sys.publish("mqtt_conack") -- 小写字母的topic均为自定义topic
+            -- 订阅不是必须的，但一般会有
+            mqtt_client:subscribe("/gnss/" .. mobile.imei() .. "/down/#")
+        elseif event == "recv" then -- 服务器下发的数据
+            log.info("mqtt", "downlink", "topic", data, "payload", payload)
+            -- 这里继续加自定义的业务处理逻辑
+        elseif event == "sent" then -- publish成功后的事件
+            log.info("mqtt", "sent", "pkgid", data)
+        end
+    end)
+
+    -- 发起连接之后，mqtt库会自动维护链接，若连接断开，默认会自动重连
+    mqttc:connect()
+	sys.waitUntil("mqtt_conack")
+    log.info("mqtt连接成功")
+    sys.timerStart(upload_stat, 1000) -- 一秒后主动上传一次
+    while true do
+        -- 业务演示。等待其他task发过来的待上报数据
+        -- 这里的mqtt_pub字符串是自定义的，与mqtt库没有直接联系
+        -- 若不需要异步关闭mqtt链接，while内的代码可以替换成sys.wait(30000)
+        local ret, topic, data, qos = sys.waitUntil("mqtt_pub", 30000)
+        if ret then
+            if topic == "close" then break end
+            log.info("mqtt", "publish", "topic", topic)
+            mqttc:publish(topic, data, qos)
+        end
+    end
+    mqttc:close()
+    mqttc = nil
+end)
+
+sys.taskInit(function()
+    while 1 do
+        sys.wait(3600*1000) -- 一小时检查一次
+        local fixed, time_fixed = libgnss.isFix()
+        if not fixed then
+            exec_agnss()
+        end
+    end
+end)
+
+sys.timerLoopStart(function()
+    upload_stat()
+end, 60000)
+
+-- sys.subscribe("NTP_UPDATE", function()
+--     if not libgnss.isFix() then
+--         -- "$AIDTIME,year,month,day,hour,minute,second,millisecond"
+--         local date = os.date("!*t")
+--         local str = string.format("$AIDTIME,%d,%d,%d,%d,%d,%d,000", 
+--                              date["year"], date["month"], date["day"], date["hour"], date["min"], date["sec"])
+--         log.info("gnss", str)
+--         uart.write(gps_uart_id, str .. "\r\n")
+--     end
+-- end)
+
+-- if socket and socket.sntp then
+--     sys.subscribe("IP_READY", function()
+--         socket.sntp()
+--     end)
+-- end
+
+-- 用户代码已结束---------------------------------------------
+-- 结尾总是这一句
+sys.run()
+-- sys.run()之后后面不要加任何语句!!!!!
diff --git a/luat/modules/luat_lib_fota.c b/luat/modules/luat_lib_fota.c
index 5f9d94977..7b6465c59 100644
--- a/luat/modules/luat_lib_fota.c
+++ b/luat/modules/luat_lib_fota.c
@@ -6,6 +6,46 @@
 @date    2022.05.26
 @demo fota
 @tag LUAT_USE_FOTA
+@usage
+-- 如果是从http获取升级包, 那么看demo/fota就可以了
+-- 以下是从其他途径获取更新包后, 调用本fota库的基本逻辑
+
+-- 逐段传入
+sys.taskInit(function()
+    fota.init()
+    while 1 do
+        local buf = xxx -- 这里是从其他途径获取的升级包片段
+        -- buf 可以是zbuff 也可以是string
+        -- 每次写入的数据长度最大不应超过4k
+        local result, isDone, cache = fota.run(buf) 
+        if not result then
+            log.info("fota", "出错了")
+            break
+        end
+        if isDone then
+            while true do
+                local succ,fotaDone  = fota.isDone()
+                if not succ then
+                    log.info("fota", "出错了")
+                    break
+                end
+                if fotaDone then
+                    log.info("fota", "已完成")
+                    break
+                end
+                sys.wait(100)
+            end
+            break
+        end
+        sys.wait(100)
+    end
+end)
+
+-- 使用文件一次性传入
+sys.taskInit(function()
+    fota.init()
+    fota.file("/xxx") -- 传入具体的路径
+end)
 */
 #include "luat_base.h"
 #include "luat_fota.h"